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National Marine Educators Association Conference 2019

National Marine Educators Association Conference 2019

Announcement

DeepWater Buoyancy is proud to announce that is sponsoring the 2019 National Marine Educators Association Annual Conference. 

About the Event

The Gulf of Maine Marine Education Association (GOMMEA) is hosting the National Marine Educators Association Annual Conference at the University of New Hampshire in Durham, NH July 21-25, 2019. The conference draws 300-400 professionals from K-12 schools, public aquariums, non-profit NGOs, and government agencies together for four days of learning, sharing, and networking.

Attend the full 3 days of programming, featuring over 100 presentations highlighting the latest trends and research in marine education, and learn from local researchers who have been studying the Gulf of Maine, learning from its history to protect its future. Single day registration is also available. Visit www.gommea.org/nmea2019 for all the details.

Conference Details

WHO: Marine education professionals from K-12 schools, public aquariums, non-profit NGOs, and government agencies

WHAT: Four days of learning, sharing, and networking, featuring over 100 presentations highlighting the latest trends and research in marine education.

WHEN: July 21-25, 2019

Sunday July 21st – Conference kick-off event at the UNH Outdoor Pool

Monday July 22nd – Wednesday July 24th – Concurrent Sessions, talks, exhibits

Thursday July 25th – Field Trips

WHERE: University of New Hampshire, Durham NH

HOW: Single and full registration is available at www.gommea.org/nmea2019.

 

About DeepWater Buoyancy, Inc.

DeepWater Buoyancy creates subsea buoyancy products for leading companies in the oceanographic, seismic, survey, military and offshore oil & gas markets.   Customers have relied on our products for over thirty-five years, from the ocean surface to depths exceeding six thousand meters.

Learn more at www.DeepWaterBuoyancy.com

About NMEA

Our mission is to make known the world of water both fresh and salt, and our annual conference brings together formal and informal marine educators from around the world to promote awareness and education of the global marine environment.

Learn more at www.marine-ed.org

About GOMMEA

GOMMEA is a regional network of educators and scientists, committed to creating connections between science and the community, to better understand the Gulf of Maine.

Learn more at www.gommea.org

Shows – April 2019

Shows – April 2019

Shows

DeepWater Buoyancy, Inc. will be participating in three shows in April.  Come and meet us face to face.  Share some thoughts.  Asks some questions.  Enjoy some chocolate.

Details about the three shows are below.  Feel free to contact us ahead of time to set up a meeting:

Dan Cote – dcote@deepwb.com

David Capotosto – davidcap@deepwb.com

MCE Deepwater Development

April 2-4, 2019

Novotel London West Hotel | London, UK

Marine, Construction & Engineering (MCE) Deepwater Development is recognized as the leading conference addressing technical issues related to engineering, development, and production of oil and gas in deep and ultra deepwater arenas around the world. As our industry confronts new challenges, the sharing of deepwater experience will play a critical role in improving the quality, safety, and economics vital to the future of the industry.

The mission of MCEDD is to provide a focused event, based in Europe and completely dedicated to the advancement of Global exploration and production. The conference addresses the myriad of technical issues and challenges confronting this industry, while offering networking opportunities unrivaled by any other industry event.

The MCE Deepwater Development Technical Conference:
Engages key members of the deepwater oil and gas community by providing a stage for world-class technical discussions focusing on the technology, innovation and experience paving the way to realizing a future of increasing demand. The technical program works together with the focused exhibition and valuable networking opportunities to create an environment conducive to better understanding the long-term vision of the global deepwater industry.

Learn More about the Conference – CLICK HERE

Ocean Business 19

April 9-11, 2019

National Oceanography Centre | Southampton, UK

Ocean Business is unique. Not only can visitors meet face to face with 330+ exhibitors from across the globe, they can also see the latest products and services first hand with over 180 hours of free to attend live demonstrations held on-board vessels, in dockside waters, in a test tank and in classrooms. Visitors can also attend the Offshore Survey conference and a variety of free to attend co-located meetings held by leading organizations in the industry. Social activities will also run alongside, providing all important networking opportunities with colleagues old and new.

DeepWater Buoyancy can be found at booth S10.

To learn more about the Ocean Business 19 – CLICK HERE

International Buoy Workshop

April 15-18, 2019

CSIRO Marine Laboratories | Hobart, Tasmania, Australia.

MTS is having the FIRST International Buoy Workshop.  The Buoy Workshop has been held for many years in the US, but this is the first time the event will be held outside the US.  Commonwealth Scientific and Industrial Research Organization (CSIRO) will be hosting the event at the CSIRO Marine Laboratories in Hobart, Tasmania, Australia.

The 2019 Conference Theme is “Buoy Technology for Extreme Environments”.  It’s all about making critical measurements offshore and getting data from the oceans back to shore.

DeepWater Buoyancy is co-sponsoring the event and will have an exhibit table.

To learn more about the International Buoy Workshop – CLICK HERE

About DeepWater Buoyancy, Inc.

DeepWater Buoyancy creates subsea buoyancy products for leading companies in the oceanographic, seismic, survey, military and offshore oil & gas markets.   Customers have relied on our products for over thirty-five years, from the ocean surface to depths exceeding six thousand meters.

Learn more at www.DeepWaterBuoyancy.com

Mooring Matters: Sustained Measurements of Crucial Ocean Currents – PART 2

Mooring Matters: Sustained Measurements of Crucial Ocean Currents – PART 2

For the next installment in our series of technical articles, Dr. Peter Spain of Teledyne RD Instruments discusses the development of ADCP technology and the use of syntactic foam buoyancy in subsea moorings for sustained measurements of ocean currents.

In Part 2 of this article Dr. Spain presents examples of moored ADCP arrays from around the world.

If you missed Part 1, find it HERE.

Sustained Measurements of Crucial Ocean Currents – PART 2

Moored ADCP Arrays Around the Globe

By Peter Spain Ph.D., Teledyne RD Instruments

Moored ADCP Array: Mozambique Channel

Located off the east coast of southern Africa, the Agulhas Current is one of the world’s major currents. It exerts diverse influences, ranging from marine transport and local biodiversity to earth’s climate system.

Different parts of the Greater Agulhas System exhibit complex circulation patterns that can change substantially from year-to-year. To understand and assess causes for this variability, scientists began studying currents that feed the Agulhas.

In 2003, the Dutch research organization NIOZ and its partners began Long-term Ocean Climate Observations (LOCO). This effort included a long-term observational program off the east coast of Africa at 17°S.

The researchers installed an extensive array of tall moorings across the narrowest part of the Mozambique Channel. The LOCO project redeployed the mooring array several times. The full array was sustained for seven years and a reduced array even longer.

During LOCO, the upper 500 m contained the strongest currents. During several settings of the array, many moorings were topped with upward 75 kHz ADCPs from Teledyne RDI.

Figure 1 – Teledyne RDI’s Long Ranger 75 kHz ADCP.

Figure 2 –  Six-year record of volume transport through the Mozambique Channel—from moored ADCP velocity data.
Credit: J. Ullgren et al. (NIOZ) 2012. LINK

The design of these LOCO moorings built on experience at this site. An initial 12-month mooring campaign had recorded currents much stronger than expected. This led to difficulties with mooring blow-over and instrument loss.

Even so the observations revealed intriguing findings. There was no persistent Mozambique Current; rather, transport through the Channel were due to a regular train of large (300-km diameter) eddies.

Fig.3. A later setting of LOCO moorings in Mozambique Channel. ADCP profiles are indicated. Scales: depth (m), distance(km).
Adapted from H. Ridderinkhof et al. (NIOZ) 2010. LINK

 The LOCO moorings included many elliptical floats to reduce drag in these strong currents. These changes reduced subsequent blow-over excursions to tens of meters.

The data set spans many years with consistently impressive spatial coverage across the Mozambique Channel.

The Dutch scientists revealed that the pronounced changes in water volume moving through the Mozambique Channel varied at three different time scales. For shorter time scales, large eddies passing southward dominate changes in transport. For seasonal periods, wind-stress patterns over the Indian Ocean basin are influential.

 At interannual time scales, the variation in transport was larger than seasonal. Although large-scale climate fluctuations were identified to be the cause, the response in the Mozambique Channel was delayed almost a year.

Exposing these changes over time – and their subtle climate connection – was possible only with the sustained measurements from the moored array. Surface drifters, floats, and gliders are quickly swept away by strong surface currents.

REFERENCES

  1. Ridderinkhof et al. (NIOZ), 2010. LINK
  2. Ullgren et al. (NIOZ), 2012. LINK

Moored ADCP Array: Faroe Bank Channel Overflow

In recent times, the role of the deep ocean in the global climate system has gained wider attention. Cold, dense waters sinking in the Nordic Seas supply the deep circulation of the global ocean.

Using seabed-mounted ADCPs, there has been long-term monitoring of these waters where they move through deep channels in overflow regions, such as Faroe Bank Channel. More recent studies have looked above the seabed plume at sites downstream from the Channel. This work uses moored ADCPs.

A key element in achieving this coverage was the use of Teledyne RDI ADCPs mounted in DeepWater/Flotec’s syntactic foam buoys. The ADCP time series helped to describe the variability in eddy action and the dominant periodicity. Also, the ADCP profiles showed the velocity signal reached through the water column.

Figure 4 – Mooring Design. Teledyne RDI ADCPs are in top and mid-water buoys supplied by DeepWater/Flotec.
 Credit: I. Fer (Univ. Bergen) 2016. PDF: LINK

Researchers at University of Bergen (Norway) wanted to clarify how the cold, deep plume changes due to entrainment of overlying ambient water. Of interest are the final volume of the plume and how its water properties have been altered before confluence with other deep flows. For these features provide the persistent signature of these waters in the deep global circulation.

Field work used a range of sensors and methods. Researchers wanted to see motions across diverse time and spatial scales. In particular, the researchers used moored ADCPs to span the whole plume. Mooring observations were merged with satellite observations and computer-modeling results.

Just downstream of the Faroe Bank Channel, an array of eight moorings measured currents for one year. The moorings were mostly in two lines located in quite different terrain. The first was in a confined channel about 25 km from the main sill. The second was 85 km downstream where the flow is less constrained. Moreover, by that distance, turbulent motions prevail with enhanced mixing through the plume.

The moorings carried Teledyne RDI ADCPs at various frequencies: 75, 150, and 300 kHz. ADCPs closer to the plume were housed in elliptical floats to reduce drag. ADCPs at higher altitude were mounted in spherical floats. Some of the latter carried both up- and down-looking ADCPs.

Figure 5 – Map of mooring array near Faroe Bank Channel. Credit: E. Darelius et al. (Univ. Bergen) 2015. Link

Three 300 kHz ADCPs were dedicated to studying mixing processes. They sat in the core of the plume and profiled its upper interface with high resolution in time and in the vertical.

The currents within the seabed plume are quite strong – almost 1 m/s at the first line. By the second mooring line, the speeds had mostly dropped though the vertical extent of the plume had increased substantially. Of interest was the plume’s high-speed core; it was more confined and had gained speed – due to moving downslope.

To examine blow-over effects on the moorings, the researchers used Richard Dewey’s software for Mooring Design and Dynamics. They constructed time series of the vertical position and tilt of the instruments using measured currents as input. Ground truth was provided by records from pressure sensors.

The researchers wanted to capture the behavior of the whole overflow plume – especially its structure and variability. The farther section had distinct differences, showing strong eddy motions that varied over 3-5 days. Also, the transport of the plume had increased by 30% at that line. The researchers were especially surprised to see how the plume’s volume was altered: not just gaining volume by entraining overlying waters but by losing colder deeper water.

Capturing any changes in the volume and makeup of the cold, dense overflow plumes is demanding. Yet this information is vital for improved understanding of the mechanisms of the deep circulation. For climate studies, sustained measurements from moored ADCP arrays provide a unique time-series view of these deep, narrow, and strong flows.

REFERENCES

I. Fer (Univ. Bergen), 2016. PDF: LINK

E. Darelius et al. (Univ. Bergen), 2015. LINK

Moored ADCP Array: East Australian Current

The East Australian Current (EAC) commands the western edge of the South Pacific. Fed by tropical waters, the EAC moves warm water southward for 2500 km along the Australian coast. Its transport is about 20 million cubic meters per second – about 40 times the Amazon River’s discharge.

Near Coffs Harbour on the north coast of New South Wales, much of the EAC turns eastward across the Tasman Sea towards New Zealand. Some residual flow moves farther south, largely as energetic eddies.

Fig.6. East Australian Current System. Credit: C. Kerry et al. (Univ. NSW) 2016. LINK

Seasonal and decadal changes in the southern extent of the warm EAC water have been attributed to altered atmospheric conditions – notably wind patterns. Casualties of changing water properties range from fisheries to kelp forests.

From April 2012, Australian scientists deployed an extensive mooring array across the EAC. This work was part of the Australian Integrated Marine Observing System – IMOS. Installed for 16 months at first, the array has been redeployed. The researchers selected a location at 27°S to discern the typical state of this major boundary current. Farther south, energetic eddies cloud the description.

Fig.7. EAC Moored Array (without M5). Black arrows show ADCP profiling coverage. Colored dots show sensors.
Credit: B. Sloyen et al. (CSIRO) 2016. LINK

Across the continental slope, each mooring carried up- and down-looking ADCPs. They were combined to profile currents to 1000 m depth. Throughout the array, all ADCPs were mounted within DeepWater/Flotec’s spherical buoys of syntactic foam.

The EAC moored array included seven moorings that carried almost 150 instruments. Moorings were heavily instrumented In the upper ocean to measure with high vertical resolution.

Moorings were fitted with many temperature and salinity probes for calculating fluxes of water properties. For measuring the upper ocean, these probes had to be immersed in the strong currents. Some issues with mooring blow-over followed.

Most moorings were over the continental slope where the poleward Current is generally located. Two moorings were located farther offshore in 5000 m depths to capture the width of the EAC system.

Figure 8 – Combining three ADCPs to profile 1000 m in EAC M2 mooring. Credit: IMOS Instrumentation 2015. PDF: LINK

 In fact, large equatorward transport was observed at the offshore edge of the mooring line – 27% of the poleward volume.

Averaged over the deployment, the ADCP measurements showed strong currents in the EAC are limited to the upper 600 m. A subsurface peak at 50-100 m depth provided a bullseye in the flow distribution. On average, poleward currents reached 1500 m; below that depth, currents were slight. For this situation, the volume moving poleward was 22 million cubic meters per second – about 70% of transport through the Florida Straits.

Snapshot views of the moored section showed the distribution of EAC currents to be coherent though very dynamic. At times, the EAC was concentrated over the continental slope whereas at other times it was wider and deeper. When the EAC was more confined, flows at depth could be equatorward across vast expanses. At other times, equatorward flow had disappeared.

Statistical analysis of the flow patterns showed two dominant modes where the EAC was either hugging the continental slope or centered farther offshore. In the latter mode, flows nearer to the shelf headed equatorward. These modes varied with multi-monthly periods that were attributed to remote forcing.

A large fraction of the Australian population lives on the eastern seaboard. The influence of the East Australian Current on their living environment is now more widely appreciated. Yet developing this understanding has been – and remains – challenging.

For scientists to see long-term trends and large-scale connections, moored arrays must collect sustained time series. And for collecting this information, Teledyne RDI ADCPs mounted in DeepWater Buoyancy flotation provide a go-to combination.

REFERENCES

2016 Sloyan, K. Ridgway, and R. Cowley (CSIRO), 2016. LINK

IMOS Instrumentation, 2015. LINK

About DeepWater Buoyancy, Inc.

DeepWater Buoyancy creates subsea buoyancy products for leading companies in the oceanographic, seismic, survey, military and offshore oil & gas markets.   Customers have relied on our products for over thirty-five years, from the ocean surface to depths exceeding six thousand meters.

Learn more at www.DeepWaterBuoyancy.com

About Teledyne RD Instruments

With well over 30,000 Doppler products delivered worldwide, Teledyne RD Instruments is the industry’s leading manufacturer of Acoustic Doppler Current Profilers (ADCPs) for current profiling and wave measurement applications; and Doppler Velocity Logs (DVLs) for precision underwater navigation applications. Teledyne RDI also supplies Citadel CTD sensors for a variety of oceanographic applications.

Learn more at www.teledynemarine.com/rdi/

Shows – March 2019

Shows – March 2019

Shows

 

DeepWater Buoyancy, Inc. will be exhibiting at three shows in March.  Come and meet us face to face.  Share some thoughts.  Asks some questions.  Enjoy some chocolate.

 

Details about the three shows are below.  Feel free to contact us ahead of time to set up a meeting:

 

Dan Cote – dcote@deepwb.com

 

David Capotosto – davidcap@deepwb.com

Subsea Tieback Forum & Exhibition

March 5 – 7, 2019

Henry B. Gonzalez Convention Center – San Antonio, Texas

Subsea Tieback’s firm foundation is its conference program. The audience is comprised of field supervisors and operations planning personnel, as well as engineering staff and management. The content addresses new operational issues, challenges, and solutions associated with global deepwater subsea operations. Dialog among strategic decision makers is facilitated through focused presentations, extended question and answer sessions, and networking. This exchange of knowledge represents experiences, applications, and current, real-world project examples. 

DeepWater Buoyancy can be found at Booth 661.  CLICK HERE

Learn More about the Conference – CLICK HERE

CWTMA

March 10-13, 2019

Catamaran Resort – San Diego, California

Workshop objectives are to provide the ocean community with a forum for technical information exchange and to promote coordination among those concerned with measuring current, waves and turbulence and their applications.

Topics Include…

  • Direct Measurements of Currents, Waves, and Turbulence
  • Indirect Current and Wave Measurement Techniques
  • Measurement Platforms and Applications
  • Operational Systems

To learn more about the CWTMA – CLICK HERE

U.S.Hydro 2019 Conference

March 18-21, 2019

Beau Rivage Resort – Biloxi, Mississippi

US Hydro is a biannual conference hosted by the Hydrographic Society of America (THSOA). THSOA and Canadian Hydrographic Association (CHA) alternate the hosting of the two premier Hydrographic conferences in North America annually.

The 2019 conference will be held at the beautiful Beau Rivage Resort & Casino. The exhibit hall and technical presentations hall will be co-located allowing for maximum interaction and networking discussions with exhibitors and presenters. In addition, the conference center is located within close proximity of the piers, not far from the exhibit hall, where exhibitors will have the opportunity to showcase their vessels and products for on-water demonstrations.

The 2019 Conference Theme will be “Our Changing Oceans and Coasts: Driving Innovation in Charting” with RDML Shepard Smith, Director, Office of Coast Survey, slotted as the Keynote Speaker.

To learn more about the US Hydro 2019 – CLICK HERE

About DeepWater Buoyancy, Inc.

DeepWater Buoyancy creates subsea buoyancy products for leading companies in the oceanographic, seismic, survey, military and offshore oil & gas markets.   Customers have relied on our products for over thirty-five years, from the ocean surface to depths exceeding six thousand meters.

Learn more at www.DeepWaterBuoyancy.com

NEW Pop-Up Buoy for Sonardyne LRT

NEW Pop-Up Buoy for Sonardyne LRT

Announcement

DeepWater Buoyancy, Inc. announces that it has developed a new Pop-Up Buoy Recovery System (PUB) for the Sonardyne LRT Acoustic Release. The product was developed at the request of Fugro GB Marine.

Like the original product, the new PUB allows for direct retrieval of seabed packages, such as anchors, anchor lines, and bottom-mounted frames and instruments.

Pop-Up Buoy Product Details

Easily mounted to any framework, the assembly sits on the seafloor until the acoustic release is activated. Once the release completes its disconnection, the buoy lifts free from the canister and rises to the surface. A synthetic line connects the buoy directly to the framework of the seabed item and allows for retrieval.

The buoy is outfitted with an electropolished 316 stainless steel frame.  The canister holds 75 meters of 1/4″ synthetic line. (Other line lengths are available upon request.) The recovery buoy is made from high-strength DeepTec® solid syntactic foam. The foam is finished with an abrasion-resistant, polyurethane elastomer coating.

The canister is made from PVC. It has a rugged design and has attachment features to permit various mounting configurations, including easy mounting to our BTM-AL50 tripod bottom mounts.

To learn more about the PUB – CLICK HERE

Acoustic Release Product Details

Sonardyne’s Lightweight acoustic Release Transponder (LRT) is depth rated to 500 meters making it the ideal choice for deploying and recovering seafloor instrumentation and equipment in continental shelf waters.

Field replaceable alkaline or lithium battery packs give a listening life of 18 months and 51 months respectively. A “screw-off” release mechanism ensures a positive release action that overcomes any biological growth and all external parts are made of high strength plastics that provide excellent environmental corrosion resistance.

LRTs are controlled using a deck unit and remote transducer on 10 meters of cable. The deck unit is initially used to program the acoustic identity of the LRT, test the transponder and load the release nut prior to deployment. Once deployed, the deck unit can measure ranges to the transponder and prior to sending a secure release command, relocate the transponder. The deck unit can be controlled via RS232 enabling raw range data to be logged to a PC.

Unlike similar low-cost release transponders It has both receive and transmit functions, enabling accurate slant ranges to be measured, release actuation to be confirmed and its position to be accurately determined.

The transponder is also compatible with Sonardyne’s ROV-Homer and Homer-Pro target relocation systems. Deployed at a point of interest, the LRT can be interrogated weeks or years later to provide range and direction guidance to a ROV pilot or diver wishing to home back on to it.

To learn more about the LRT – CLICK HERE

About DeepWater Buoyancy, Inc.

DeepWater Buoyancy creates subsea buoyancy products for leading companies in the oceanographic, seismic, survey, military and offshore oil & gas markets.   Customers have relied on our products for over thirty-five years, from the ocean surface to depths exceeding six thousand meters.

Learn more at www.DeepWaterBuoyancy.com

About Sonardyne

We are a leading independent global provider of underwater acoustic, inertial, optical and sonar technology and this is what we do. We track, we position, we control, we monitor, we detect, we recover, we image, we locate, we navigate, we avoid, we engineer, we service and we support. We can do this for you, wherever you are operating in the world, safely and responsibly, within your budgets and to your timescales. Find out how by getting in touch with us today.

Learn more at www.sonardyne.com

DeepWater Buoyancy Receives OSHA’s SHARP Award

DeepWater Buoyancy Receives OSHA’s SHARP Award

DeepWater Buoyancy announced today that it has received OHSA’s Safety & Health Achievement Recognition Program (SHARP) award.  

The award was presented at the companies facility in Biddeford, Maine by Maine Department of Labor’s Director of Workplace Safety, Steven Greeley. 

Director Greeley was accompanied by members of Maine’s SafetyWorks team. Also on hand was Mathew Eddy, Director of Planning and Development for Biddeford.

Matthew Henry, Plant Manager stated, “We are very proud of our team today.  They worked very hard to achieve this milestone.  Along with our ISO 9001:2015 quality management system certification, the SHARP award shows external validation of our Quality, Safety, Health and Environmental (QSHE) programs.  These awards are not about plaques on the wall, but are about outside accountability to recognized standards in the industry.  The policies, philosophy and practices of these standards are woven into our culture and into all of our business systems.”

Award presented to Matthew Henry, DeepWater Buoyancy’s Plant Manager by Steve Greeley, Maine Department of Labor’s Director of Workplace Safety

About SHARP

SHARP is a program that recognizes small business employers who have used OSHA’s On-Site Consultation Program services and operate an exemplary safety and health programs.  Acceptance of a worksite into SHARP from OSHA is an achievement of status that singles out a business amongst its peers as a model for worksite safety and health. 

To participate in SHARP, a company must:

  • Request a comprehensive consultation visit from an On-Site Consultation office that involves a complete hazard identification survey;
  • Involve employees in the consultation process;
  • Correct all hazards identified by the consultant;
  • Implement and maintain an safety and health programs that, at a minimum, addresses OSHA’s Safety and Health Program Management Guidelines;
  • Maintain its Days Away, Restricted, or Transferred (DART) rate and Total Recordable Case (TRC) rate below the national average for your industry; and
  • Agree to notify their state’s On-site Consultation office prior to making any changes in the working conditions or introducing new hazards into the workplace.

DeepWater Buoyancy is now one of approximately 60 companies in Maine and one of less than 1800 companies in the US who have achieved this status.

Learn more HERE

About ISO9001:2015

ISO 9001 is the internationally-recognized standard for Quality Management Systems (QMS). It is the most widely used QMS standard in the world, with over 1.1 million certificates issued to organizations in 178 countries. ISO 9001 provides a framework and set of principles that ensure a common-sense approach to the management of an organization to consistently satisfy customers and other stakeholders. In simple terms, ISO 9001 certification provides the basis for effective processes and effective people to deliver an effective product or service time after time.  The 2015 version of ISO 9001 standard requires greater involvement by senior management, an increased focus on supply chains, and closer examination of stakeholder expectations.

Since its foundation, DeepWater Buoyancy has been operating its Quality Management System in compliance to the ISO 9001:2008 standard. In the fall of last year, the company was certified to the latest standard, ISO9001:2015 by the global certification body NQA.  “We are dedicated to constant improvement of all aspects of our business”, said David Capotosto, DeepWater Buoyancy’s Director of Quality. “Updating our systems to the latest standard demonstrates our continued commitment to quality products and processes.”

Learn more HERE

About DeepWater Buoyancy, Inc.

DeepWater Buoyancy creates subsea buoyancy products for leading companies in the oceanographic, seismic, survey, military and offshore oil & gas markets.   Customers have relied on our products for over thirty-five years, from the ocean surface to depths exceeding six thousand meters.

Learn more at www.DeepWaterBuoyancy.com

Product Spotlight – ADCP Buoy Frames

Product Spotlight – ADCP Buoy Frames

DeepWater Buoyancy is the world’s largest producer of subsea buoyancy products for the oceanographic community. At the heart of the product line are the deployment solutions for ADCP applications, including spherical and elliptical buoys, the low-drag StableMoor® buoy, trawl-resistant bottom mounts (TRBMs) and diver serviceable bottom mounts.

This article will spotlight DeepWater Buoyancy’s frame designs for ADCP buoys.

For more information, click HERE.

In the early days of acoustic doppler current profilers (ADCPs) most units on the market were designed with four transducer beams. To most effectively accommodate these four-beam ADCPs, buoys were produced with four tie-rods that pass through the buoy and end frames with four legs that attach to the tie-rods. This design allowed for the beams of the ADCP to pass between the frame legs, unobscured.

Advances in ADCP technology have since led to ADCPs with as few as three beams and as many as nine transducer beams. In some cases, a center (vertical) beam is included in the configuration. These technological advances in ADCP design have led to changes in the design of the framework for ADCP buoys.

ADCPs with various transducer configurations.

In the case of a three-beam ADCP, buoys are now offered with three tie-rods and end frames with three legs that pass between the beams.  For customers who have previously purchased a buoy outfitted for a four-beam ADCP, but now look to use a three-beam ADCP, a frame is available that mounts on the four tie-rods and transitions to three legs to pass between the beams. Additionally, a buoy can be outfitted with a four-beam frame on one end and a three-beam frame on the other for compatibility with both systems.

ADCP Buoy Top Frame made for a 3 beam ADCP to be mounted in a buoy with four tie-rods.

When a buoy is at the top of a mooring and a vertical beam is used, or when an ADCP with several beams is used, typical frames would block the beam or beams. And since the buoy is at the top of the mooring string, the need for a top arbor is eliminated. In this case a ring frame is used.  This frame serves to protect the ADCP head during deployment, recovery, and handling on the deck of a vessel, but will not obstruct the beam pattern.

Ring Frame for ADCP with center vertical beam.

 

All frames are manufactured with 316L stainless steel. The frames are then electropolished and fitted with replaceable zinc anodes for superior corrosion resistance.  Frames with arbors on them are fitted with isolation bushings and allow connection to the mooring line with standard shackles.

Our extensive in-house design, machining, metalworking, and welding capabilities allow us to make an endless variety of these frames to support and protect not only ADCPs, but also a wide range of other instrumentation. DeepWater Buoyancy’s engineering staff will work with you to design the exact frame that best meets the needs of your equipment, pass through loads, and time at depth.

 

About DeepWater Buoyancy, Inc.

DeepWater Buoyancy creates subsea buoyancy products for leading companies in the oceanographic, seismic, survey, military and offshore oil & gas markets.   Customers have relied on our products for over thirty-five years, from the ocean surface to depths exceeding six thousand meters.

Learn more at www.DeepWaterBuoyancy.com

In Print – Maine International Trade Center GlobalView

In Print – Maine International Trade Center GlobalView

DeepWater Buoyancy was chosen as the lead story for this quarter’s edition of Maine International Trade Center’s GlobalView Newsletter.

The Maine International Trade Center visited the DeepWater Buoyancy facility and interviewed our Director of Business Development, David Capotosto

See the whole newsletter HERE.

 

MAINE IS INTERNATIONAL: Focus on Biddeford-Saco

As a statewide organization, Maine International Trade Center (MITC) has internationally engaged members located in all 16 counties that include manufacturers, service providers, and educational institutions. This article is the first in a series that will explore the diversity and dynamism of Maine’s international community through profiles of our members and economic development partners across the state.

The Biddeford-Saco region is experiencing significant economic growth. With over $200 million of investment in recent years, the once abandoned Mill District is the center of activity with over 150 businesses. Located in York County, these twin communities are the sixth (Biddeford) and eighth (Saco) largest cities in Maine. Here’s a look at what international means to three MITC members in the region.

DeepWater Buoyancy

When people ask David Capotosto what his Biddeford company does, his answer might sound confusing.

“I say we make stuff that floats underwater,” says Capotosto, Co-President and Director of Business Development at DeepWater Buoyancy. “Anyone that wants to put something heavy under the ocean and get it back someday probably needs us.”

“Let’s say you want to study ocean currents, or you want to look at the long-term effects of PH in deep sub-sea,” continues Capotosto.

For such research, monitoring equipment must be placed on the sea floor beneath thousands of meters of water to collect data for some period of time and then later brought back to the surface.

DeepWater Buoyancy designs, engineers, and manufactures buoys that are sent off a boat with the measuring instruments and a heavy weight that sinks everything to the bottom. When it’s time to recover the mooring, an acoustic signal is sent to the equipment telling it to detach from the weight, and the buoy floats to the surface bringing the instruments and data with it. The company is the worldwide leader in underwater buoyancy for the oceanographic community.

About 35% of what they produce leaves the country. The UK and China have been two strong markets, although Capotosto noted that the last round of China retaliatory trade tariffs will affect the landed cost of the buoys.

DeepWater Buoyancy was formed in 2013, but the product they make has been around for close to 40 years. Founded in 1979 as Flotation Technologies, the company was family run for many years then sold to larger companies out-of-state. Now, 4 former employees of Flotation Technologies own the new company, and many of the 22 employees have actually worked together for decades.

The company has been selling internationally for many years and seeks out Maine International Trade Center for guidance on workforce development, market research, export controls, and grant assistance.

“We’re buoyancy specialists, not grant specialists, so having access to people who know about the grant world and the other resources at MITC, instead of creating it all in-house, makes sense for us,” said Capotosto.

The company anticipates significant growth in the next 5 years which includes launching new products, expanding into new markets, making capital investments, and hiring more people. Growth that is exciting, yet also measured.

“Strategically, we take a conservative approach because we want sustainable success for everyone,” says Capotosto. “We want this to be around for the children of our employees should we be so blessed and fortunate to have our markets remain strong.”

About DeepWater Buoyancy, Inc.

DeepWater Buoyancy creates subsea buoyancy products for leading companies in the oceanographic, seismic, survey, military and offshore oil & gas markets.   Customers have relied on our products for over thirty-five years, from the ocean surface to depths exceeding six thousand meters.

Learn more at www.DeepWaterBuoyancy.com

About Maine International Trade Center

Maine International Trade Center (MITC) helps Maine businesses enter and expand global markets for their products and services. MITC offers one-on-one consulting and research, affordable group trade show participation, connections around the world, export reimbursement funds for small businesses, and more. Leveraging overseas synergy, MITC also works to increase international student attraction and foreign investment. A public-private partnership, MITC is funded through Maine Department of Economic and Community Development (DECD), corporate contributions, and membership dues of nearly 300 businesses and organizations.

MITC members include manufacturers and service providers, economic development and government agencies, educational institutions, and trade assistance organizations.  We work with both exporters and importers.

Learn more at www.mitc.com/

Technical Paper: DoE Approach to Mooring Design

Technical Paper: DoE Approach to Mooring Design

DeepWater Buoyancy collaborated with Maine Marine Composites (MMC) on a paper for the Oceans18 Conference. 

The paper, entitled “A Design of Experiments based approach to engineering a robust mooring system for a submerged ADCP”, was presented by Tobias Dewhurst, PhD of MMC.

A copy of the paper can be downloaded HERE.

A copy of the PowerPoint presentation can be downloaded HERE

A Design of Experiments Based Approach to Engineering a Robust Mooring System for a Submerged ADCP

 

Authors

Michael T. MacNicoll, Tobias Dewhurst, PhD, Richard Akers, P.E. – Maine Marine Composites LLC, Portland, ME, USA

David A. Capotosto, DeepWater Buoyancy, Inc., Biddeford, ME, USA

Summary

A model-based engineering approach was used to design an optimal single-point mooring for a subsea Acoustic Doppler Current Profiler (ADCP). Numerous inputs and criteria were considered. Target deployment depth, environmental conditions, and seafloor characteristics were identified for the selected site in the Gulf of Maine. Design variables included buoy shape, buoy volume, gravity anchor mass, chain size, acoustic release buoyancy, and wire rope diameter. Design criteria included wire rope safety factor, chain load safety factor, ADCP pitch, ADCP knockover (set down), anchor sliding, and the recoverability of the Acoustic Release.  A design methodology based on Design of Experiments (DoE) theory was used to develop a mooring system that satisfied all the competing design objectives while minimizing cost. This methodology limited expensive simulation time while resulting in a satisfactory mooring design.

Keywords—Acoustic Doppler Current Profiler; ADCP; Mooring Design; Design of Experiments

I.    Introduction

A.   Motivation

Numerous competing criteria must be considered when designing mooring systems for oceanographic instruments. These criteria include the deployment depth range, acceptable pitch angles, and cost. Furthermore, environmental conditions and seafloor characteristics must be accounted for properly. An under-designed system could allow excessive instrument motion or movement of the anchor. An overdesigned system increases component costs and requirements for deployment assets. For example, oversizing the mooring line adds weight to the system, which in turn increases the buoyancy requirement. Increasing the buoyancy creates greater stress on the mooring line and increases the anchor weight requirement. These changes drive up the costs. A successful design approach must balance multiple competing criteria without requiring excessive simulation time, while resulting in a mooring system that meets the design criteria under all expected environmental conditions without overdesigning the system.

B.   Methodology

A simulation-based engineering approach was used to design an optimal single-point mooring for a subsea Acoustic Doppler Current Profiler (ADCP). This approach satisfied the objectives above by applying computer simulations in a Design of Experiments (DoE) framework. Using the DoE methodology, an experiment was designed to identify the factors that drive mooring system performance and cost. The results of the experiment were then used to optimize the system based on linear regression of the DoE results. This regression model accounted for both the first-order interactions between factors, and the competing design objectives discussed above.

Simple experiments often attempt to isolate variables and study their effects on a system one at a time. There are two limitations with this approach. First, the number of variables is artificially limited, to limit the time and effort to carry out an experiment. Second, this approach fails to study how design factors might interact with each other. The Design of Experiments (DoE) approach overcomes these shortcomings [1].

DoE is a systematic approach to quantify how sensitive a system is to factors that are believed to influence that system. A DoE setup will require first identifying the factors to be examined. Next, two levels are selected for each factor, and experiments are carried out on the system. This can be done using each possible combination of levels and factors, or a subset of each combination. When the number of factors is large, then the number of all possible combinations of levels and factors can become excessive, so a fractional factorial experiment may be designed that still ensures there is no aliasing between factors and first order interactions between factors.

In the present study, MMC applied a DoE approach to design a mooring system for a submerged ADCP. The DoE approach allowed for efficient examination of a very large design space, identification of the design factors that have the greatest impact on the design objectives, and development of an optimal design.

Fig. 1 lays out this design approach. An initial design is proposed, and design constraints are quantified. Design factors are identified. Upper and lower levels are determined for each factor. These levels represent the highest and lowest likely values for each design factor. Next, a DoE experiment is set up and computer simulations are run. The results of the DoE simulations are used to develop a regression model based on the design constraints. If the optimal design does not satisfy the design constraints, a revised DoE is developed. The revised DoE will require adjusting the levels of the factors, or adding new factors, to improve the results. The process is repeated until the optimal design converges on one which satisfies the constrained design objectives.

Figure 1. Flowchart of Design Approach

II.    Procedure

A.   Mooring System Initial Design

The ADCP mooring equipment was based on a typical mooring system design (see [2] for example) The arrangement consists of an anchor, connected with chain to an acoustic release (used to retrieve the ADCP) with some added buoyancy, and a wire rope from the acoustic release to a buoy that keeps the ADCP in position. The ADCP is attached to the top of the buoy and is positioned 100 meters below the surface to avoid the most extreme wave motions. The buoy has the dual objectives of (1) providing reserve buoyancy to keep the ADCP upright and in position to minimize pitching and knockover (set down) motions, and (2) to bring the mooring string to the surface when the release is activated. The arrangement is shown in Fig. 2.

Figure 2 Components of moored ADCP. Chain and wire rope lengths are not to scale.

B.   Environmental Conditions

The ADCP will be deployed near the National Oceanic and Atmospheric Administration’s (NOAA) National Data Buoy Center (NDBC) Station 44098, Jeffrey’s Ledge in 300 meters of water [3]. A robust metocean study of the deployment location was performed by MMC using historical wave data from NDBC for the years 2008-2015. This study used Principle Component Analysis and the inverse first-order reliability method (I-FORM), as described in [4] and as implemented in the Wave-Energy-Converter Design Response Toolkit [5]. In this approach, linear algebraic methods are used to develop an orthogonal basis whose components are aligned so as to represent the largest degree of variance.  Once these principal components are identified, extreme contours are generated using the I-FORM approach [6]. The extreme contour was limited to the steepness at which waves generally break. The resulting 50-year return period contour is shown in Fig. 3. From this analysis, the largest 50-year return period significant wave height is 10.7 m, with a peak period of 13 s.

Figure 3  50-year sea state contour at Jeffrey’s Ledge, NH (solid blue line). Blue dots are historical observations. Contour lines show probabilities of occurrence.

 

C.   Design Constraints

As the goal of this study was to use a DoE-based approach to design a robust and cost-effective mooring system, the following seven design objectives were identified:

  • Prevent uplift and sliding of the anchor
  • Minimize knockover of the ADCP
  • Minimize pitch of the ADCP
  • Maintain minimum safety factor of the wire rope of at least 1.67 [7]
  • Maintain minimum safety factor of the anchor chain of at least 1.67 [7]
  • Acoustic release must have enough buoyancy to be recoverable if the wire rope fails and the acoustic release is disconnected from the upper buoy.
  • Minimize the cost of the system

D.   Design Factors

Six design factors were identified. These are the variables of the mooring arrangement that will be tuned by the DoE simulations. Two factors related to the ADCP buoy. Two buoy shapes, a spherical buoy and an elliptical buoy, were simulated. These are based on ADCP buoys made by DeepWater Buoyancy Inc., shown in Fig. 4. In addition, two buoy volumes (and corresponding buoyancy lift forces) were simulated for each shape. The buoy has the primary objectives of mitigating ADCP pitching and knockover. Larger buoys will increase the cost of the system and the loads on the mooring lines, while smaller buoys will be less effective in mitigating ADCP motions.

The third design factor is the mass of the anchor. The anchor must be heavy enough that it does not move, either vertically or laterally. However larger anchors will increase the cost of the system.

The diameter of the chain and wire rope components of the mooring line are the next two factors. The primary trade-off for these components is safety factor vs. cost. Smaller components will have lower safety factors, but larger components will drive up the cost of the system.

The final factor is the buoyancy of the acoustic release. This must provide enough uplift to ensure that the acoustic release can be recovered if the wire rope fails and the acoustic release is separated from the reserve buoyancy.

These design factors, and the corresponding higher and lower levels, are summarized in TABLE I. In a full factorial DoE, every combination of high and low levels for each factor would be simulated, resulting in 27=128 simulations. In this work a fractional factorial matrix was design with resolution four, which ensured that all primary factor and first order interaction effects could be isolated without aliasing, while reducing the number of required simulations [8].

Figure 4  ADCP buoyancy options. Top: spherical buoy; bottom: elliptical buoy (source: www.deepwaterbuoyancy.com).

 

Table 1  Summary of DoE Input Factors

 

E.   Computer Simulation

A computer simulation of the ADCP and its mooring system was developed using the commercial software OrcaFlex by Orcina [9]. Simulations were run for each row of the fractional factorial matrix during the 50-year return period storm with a steady current.

Three phases of ADCP deployment were investigated in the DoE simulations, including (1) deployment in calm water, (2) survival in 50-year return period storm event, and (3) retrieval using the acoustic release. Deployment involved releasing the ADCP from the surface and allowing the entire system to sink until the anchor reached the seabed. The retrieval was simulated by disconnecting the reserve buoyancy buoy from the wire rope, and the acoustic release from the chain. The acoustic release, provided it was buoyant enough, would rise to the surface with the wire rope.

The results of the DoE simulations are shown in Main Effects plots in Fig. 5. Each subplot shows the sensitivity of a single factor to the corresponding design objective. The steeper the line, the more sensitive the objective is to that factor. Some of the design trade-offs that must be considered are shown clearly in this figure. For example, increasing the buoy volume has the beneficial effects of decreasing the ADCP pitching and set down. However, there are also negative consequences to increasing the buoy volume, such as increasing the mooring loads, increasing the likelihood of anchor sliding, and increasing the cost of the system. To weight the pros and cons of conflicting design objectives, a global objective function was developed. This is discussed in the following section.

Figure 5  Summary of Design of Experiments simulation results. Each row shows the Main Effects plots for every factor and a single objective. Each column shows the Main Effects plots for every objective for a single factor.

 

F.   Optimization Results

The results of the DoE simulations were used to optimize the ADCP mooring system design. For each of the design objectives discussed above, a linear regression model was computed. For objective i, this takes the form:

(1)

Here bi are the regression coefficients and X are the levels for each factor, including first-order interactions and a constant intercept.

There are several limitations with using a strictly linear regression model to optimize the mooring design. First, there is no convenient way look at multiple design objectives at the same time. Second, many objectives are not linear. For example, the safety factor of the mooring rope must be at least 1.67, however, once it is over that threshold, it is less critical that it continue to be improved. To account for these limitations, each design objective was normalized with a logistic function,

(2)

Here fi(X) is the regression function for objective, i, and ki and x0,i are steepness and midpoint parameters which must be identified. The global objective function is then taken as the minimum of each objective:

 (3)

This is illustrated in Fig. 6. The wire rope safety factor experiences a steep drop-off when the safety factor approaches the design target. Above the target, the safety factor is not as sensitive to changes in the wire rope diameter. The cost objective function does not experience a steep drop-off, as there is no hard target. The optimal wire rope diameter is the peak of the Combined Objective function, which is located at the intersection of the two sub-objectives.

Figure 6  Illustration of wire rope safety factor and cost objectives as a function of wire rope level. The combined objective function is shown in red.

 

When all six design factors and all seven design objectives are considered, it is not possible to visualize the objective function in two dimensions. Fig. 7, Fig. 8, and Fig. 9 each show the objective function plotted as a surface plot for two factors.

Fig. 7 shows the objective function as a surface plot with respect to the chain diameter and the wire rope diameter. There is a trade-off between safety factor and cost that suggests that the optimal wire rope and chain diameters are roughly halfway between the upper and lower DoE levels.

Figure 7  Objective surface plot shown with respect to chain diameter (x-axis) and wire rope diameter (y-axis). Yellow regions show the peak objective values.

 

Fig. 8 shows the objective function with respect to the buoy shape and size. The buoyancy must optimized to balance a reduction in cost with an increase in wire rope safety. As the buoyancy decreases, however, the ADCP pitch increases. An elliptical buoy shape better mitigates ADCP pitch than a spherical buoy.

Figure 8  Objective surface plot shown with respect to reserve buoyancy (buoy) shape (x-axis) and buoy volume (y-axis). Yellow regions show the peak objective values.

 

Fig. 9 shows the objective function with respect to the anchor mass and acoustic release buoyancy. The optimal design occurs when the anchor mass and acoustic release buoyancy are large, but beyond a certain point the design is less optimal as the cost of the system becomes the limiting factor.

Figure 9  Objective surface plot shown with respect to anchor mass (x-axis) and acoustic release buoyancy (y-axis). Yellow regions show the peak objective values.

 

III.    Results

Once the objective function was defined, most standard optimization routines can be used to determine the optimal values. TABLE II. summarizes the optimal levels of each factor.

Table 2  Summary of Optimal Design

 

The optimal ADCP buoy is an elliptical buoy with a diameter of 50.5 inches. The optimal mooring lines are a 7.6 mm diameter wire rope and an 8.1 mm diameter studless chain. To ensure that sliding on the seabed is minimized, the anchor mass must be 1,694 kg, slightly larger than the highest level simulated. The acoustic release needs an additional 0.185 m^3 of buoyancy to ensure that it will be retrieved if it becomes separated from the buoy.

To validate that the DoE procedure successfully converged on a working arrangement, the design summarized in TABLE II. was simulated for a duration of three hours in the maximum 50-year return period sea state at the Jeffrey’s Ledge site. Extreme Value Analysis was used to find the peak expected value and confidence intervals for each objective. For objectives that are Gaussian, or nearly so, the three-hour extremes were computed according to:

Here x is an arbitrary data field, μx is the simulated mean, T is the dominant wave period, and σx is the simulated standard deviation.
For non-Gaussian distributed objectives, such as the mooring tension, the three-hour extremes were fit to a Generalized Pareto Distribution, using a Peaks-Over-Threshold (POT) approach [10], [11]. Then the upper 95th percentile of the expected values are used.
The results are summarized in TABLE III. The wire rope and chain safety factors are acceptable – both well above the target of 1.67 [7]. The pitch angle and knockover are manageable, the anchor stays in place, and the Acoustic Release is successfully recovered.

Table 3  Summary of Optimal Design Results

 

IV.    Discussion

Maine Marine Composites, in collaboration with DeepWater Buoyancy Inc, applied a Design of Experiments-based simulation approach to developing a robust, cost-effective mooring system for a hypothetical submerged ADCP in the Gulf of Maine. The DoE approach made it possible to quickly examine a broad range of design factors and levels, and the optimal design was shown to meet all the desired objectives.

The objective function used for optimization is based on linear regression of the DoE results. The objective function is constructed in such a way that all objectives are met without needlessly maximizing any objectives beyond their target levels. This approach supports both constraints and objectives, where constraints are a limit the design must achieve (“Ensure that the mooring safety factor is at least 2.2”) and objectives are more open-ended (“Minimize the cost of the mooring system”).

References

  1. Fisher, R., Design of Experiments, 8th, Oliver and Boyd LTD, Edinburgh, 1960.
  2. Ma, B.B., Lien, R-C., and D.S. Ko, “The variability of internal tides in the Northern South China Sea,” J. Oceanogr. 69, 2013, pp. 619-630.
  3. National Oceanic and Atmospheric Administration’s National Data Buoy Center. “Station 44098 – Jeffrey’s Ledge, NH (160).” S. Dept. of Commerce. https://www.ndbc.noaa.gov/station_page.php?station=44098.
  4. Eckert-Gallup, Sallaberry, Dallman, Neary. “Application of principle component anlysis (PCA) and improved joint probability distribution to the inverse first-order reliability method (I-FORM) for predicting extreme sea states,” Ocean Engineerign, 2016, pp. 307-319.
  5. Coe, R.G. Michelen, C., Eckert-Gallup, A., Yu, Y., and J.v. Rij, “WDRT: A toolbox for design-response analysis of wave energy converters,” Proceedings of the 4th Marine Energy Technology Symposium (METS), Washington D.C., 2016.
  6. Haver, S., and S. Winterstein, “Environmental contour lines: a method for estimating long term extremes by short term anslysis,” Trans. Soc. Nav. Archit. Mar. Eng. 116, 2009, pp. 116-127.
  7. American Bureau of Shipping (ABS), Guide for Position Mooring Systems, Houston, TX, 2018.
  8. Krishnaiah, K., and P. Shahabudeen, Applied Design of Experiments and Taguchi Methods, PHI Learning Private Limited, New Dehli, 2012.
  9. Orcina LTC, OrcaFlex User Manual: OrcaFlex Version 10.2c, Daltongate Ulverston Cumbria, UK, 2018.
  10. Bommier, E., “Peaks-Over-Threshold Modelling of Environmental Data,” U.U.D.M. Project Report, 2014:33.
  11. do Nascimento, F.F., Gamerman, D., and H. Freitas Lopes, “A semiparametric Bayesian approach to extreme value estimation,” Stat. Comput. 22, 2012, pp. 661-675.

About DeepWater Buoyancy, Inc.

DeepWater Buoyancy creates subsea buoyancy products for leading companies in the oceanographic, seismic, survey, military and offshore oil & gas markets.   Customers have relied on our products for over thirty-five years, from the ocean surface to depths exceeding six thousand meters.

Learn more at www.DeepWaterBuoyancy.com

About Maine Marine Composites

MMC specializes in motion prediction for ships and platforms, analyses of fluid/structural dynamics, and mooring system design and simulation. Our engineering staff has decades of experience with design and analysis of ships and offshore energy systems, and has successfully completed diverse and challenging projects for many of the most highly regarded offshore and ocean energy companies.

For more information, please contact Richard Akers at dakers@mainemarinecomposites.com

Learn more at www.mainemarinecomposites.com

Mooring Matters: Sustained Measurements of Crucial Ocean Currents – PART 2

Mooring Matters: Sustained Measurements of Crucial Ocean Currents

For the next installment in our series of technical articles, Dr. Peter Spain of Teledyne RD Instruments discusses the development of ADCP technology and the use of syntactic foam buoyancy in subsea moorings for sustained measurements of ocean currents.

Sustained Measurements of Crucial Ocean Currents

Teledyne RDI ADCPs and DeepWater Buoyancy Deliver a Go-To Combo

By Peter Spain Ph.D., Teledyne RD Instruments

Current Profiling

ADCPs are sonar systems that measure motion underwater. Using sound waves, they work like hand-held radars used by police to catch speeding motorists. To measure motion, ADCPs emit sound bursts along beams angled upward or downward.

Echoes are returned due to scattering off particles. Because zooplankton and suspended sediments are carried by the moving water, echoes scattered off them carry a change in pitch; this is the Doppler Effect. It tells how fast the current is moving and in what direction.

Sound waves propagate through the water column so echoes are returned and processed from many depths. The vertical range of this collection of measurements—called a profile of ocean current velocities—is greater for lower frequency sound waves.

Introduction

Next to the eastern seaboard of continents stream the largest currents on the planet. They have been well-known to seafarers for centuries. Found around the globe, these major ocean currents are energetic, narrow and deep. They exist in all ocean basins, north and south of the equator: Gulf Stream, Kuroshio, and Brazil, Agulhas, East Australian Currents respectively.

These strong currents move much warm water poleward from low latitudes; thus, they redistribute heat for the earth’s climate system. On shorter time scales, they affect regional and local weather. These flows transfer organisms, nutrients, chemicals, debris, and pollutants – all affect life in and out of the sea and along coastlines. And strong currents affect routes selected by shipping.

Crucial ocean currents have been studied to measure their structure, transport, and fluxes—and, in recent times, their changes on seasonal and longer times scales. In ball-park numbers, these flows span 100 km, move faster than 100 cm/s, and carry 100 times the outflow of the world’s largest river.

Measuring these currents has been challenging. To capture their extent, measurements need to reach deep. To resolve changes over time, measurements need to be sustained. And to survive, persistent measurement methods need to withstand the energy of these powerful currents. For example, surface drifters, floats, and gliders are quickly swept away in strong upper-ocean currents.

Figure 1. Large ADCP Buoys with Teledyne RDI ADCPs off South Africa. Credit: SAEON Egagasini Node. http://asca.dirisa.org/

Programs making long-term measurements of important currents rely on resilient moorings. And for measuring strong currents in the upper ocean, these moorings carry ADCPs.

In this two-part report, we first review some background to moorings carrying Teledyne RDI ADCPs mounted in DeepWater Buoyancy buoys. Then we look at sustained measurements of crucial ocean currents in some less-familiar places.

Figure 2. William Richardson, pioneer of Buoy Group at WHOI. Credit: Nova Southeastern University. LINK

Background

Almost 60 years ago at WHOI [1], William. S. Richardson launched the modern era of ocean-current metering. For studying deep-sea currents—notably, the Gulf Stream—he identified and invented two essential tools: a recording current meter and an unattended mooring. Richardson’s intent for the mooring was to suspend current meters at several depths. The meters would record long time-series of currents simultaneously. For studying currents across large areas, Richardson deployed several moorings.

Over the next two decades, the Buoy Group at WHOI engineered this reality. Their impressive results were hard won in the harsh and unforgiving environment of the deep sea. You can read more at this link: 50-years-of-the-whoi-buoy-group. For the UK story, see this PDF: UK_moorings.pdf.

Along the way, one key problem was mooring loss. A leading culprit was large drag force caused by strong currents. The adjacent graphic shows a section of the Gulf Stream in the upper 2000 m. Speeds are directed along-stream. Notice the extreme current speeds in the upper ocean and the large spatial gradients.

[1] Woods Hole Oceanographic Institution. See Richardson et al. report (WHOI Ref: 63-1)

Figure 3. Gulf Stream currents and thermal structure. Distance: km, Current speeds: cm/s. Credit: Halkin + Rossby, 1985. LINK

For recording currents accurately, the meters need to hold position in three dimensions. The mooring must therefore be taut. To this end, sizable buoyancy is added to the mooring line. Yet, unavoidably, these elements increase drag forces exerted by strong currents.

Besides sweeping away moorings, strong drag forces caused mooring lines to pull apart (part way up) or to blow-over. The latter mooring motion carried instruments and mooring elements in large vertical excursions: 300-500 m in a tall mooring. See Fig. 4. These excursions confounded interpretation of measurements. Worse, the mooring could sink when in-line buoyancy was crushed by high pressure at unplanned depths.

Figure 4. Large vertical excursions of a mooring line in the Gulf Stream. Time series of two pressure sensors mounted in-line and separated by 200 m.  Credit: Hogg, 1986.  LINK

Mooring Changes

By the mid 1980’s, the design of both moorings and current meters had evolved substantially. Fig. 5 shows typical designs. Highlighted are important changes in mooring components. Notice the change in where buoyancy is added.

One strategy to decrease mooring losses was reducing drag. Major currents have strong near-surface speeds. To avoid these, moorings that terminated subsurface were developed. Many were topped with large spherical buoys. They provide the same buoyancy for less drag than smaller options. To solve the crushing problem during severe blow-over, these large spheres were made of syntactic foam.

Figure 5. Deep-sea moorings—pre ADCPs: Changes from early-1960’s to mid-1980’s. Credit: Richardson et al., 1963 WHOI Ref 63-1;  Molinari, 1986 LINK

Beginning with Hogg (1986), scientists introduced methods for correcting measurements confounded by blow-over of a mooring. As well, methods for evaluating the design and dynamics of moorings were more available. See Mooring Design and Dynamics

Figure 6. Spherical syntactic foam buoys housing Teledyne RDI ADCPs. Credit: NOAA. LINK

ADCPs

From the mid 1980’s, ADCPs provided a new solution for measuring strong surface currents. A mechanical current meter must be immersed in the flow it measures. In contrast, ADCPs are sonar systems; they can measure current velocity remotely. They emit an acoustic signal and then process the informational content of returning echoes.

Scientists realized that ADCPs looking upward could be used to measure strong surface currents while deployed in slower waters below. This helped reduce drag on the mooring. To this end, ADCPs were mounted in the flotation buoy atop subsurface moorings. Pioneering this approach was Friedrich A. Schott at University of Miami.

DeepWater Buoyancy’s antecedent, Flotation Technologies, developed these buoys as standard kit for ADCPs. Using syntactic foam for flotation elements permitted custom designs. Notably, a cylindrical instrument well was inserted along the vertical axis of the large spheres. Housing ADCPs in this sheltered location reduced current drag on the mooring. Since the late 1980’s, ADCPs have been commonly mounted atop a subsurface mooring within a collar of syntactic foam.

To further decrease drag on the mooring, new designs evolved for syntactic flotation buoys. An elliptical-shaped float that is more hydrodynamic became a common component on many deep sea moorings.

Figure 7. DeepWater Buoyancy Elliptical ADCP Buoy.  LINK

For measuring very strong currents, such as tidal streams, a torpedo-shaped buoy is now state-of-the-art. This approach reduces drag and increases stability in pursuit of moored nirvana—low tilt and minimal vertical excursions.

Figure 8. DeepWater Buoyancy StableMoor® Buoy holding Teledyne RDI ADCP. Credit: Bedford Institute of Oceanography. LINK

Moored ADCP Arrays

A mix of methods is needed to clarify the long-term effects of global warming. Moored arrays in major ocean currents provide an essential ingredient. Insights have come from researchers using computer models and satellite-based observations. And drifters, gliders, and floats can provide snapshots. Yet there is no substitute for hanging around in these deep and energetic flows.

For scientists to see long-term trends and large-scale connections, moored arrays must collect sustained time series. And for collecting this information Teledyne RDI ADCPs mounted in DeepWater Buoyancy flotation provide a go-to combination.

.   .   .   .   .   .   .  

 

In Part 2 of this report, we review some compelling examples of moored ADCP arrays measuring crucial ocean currents around the globe.

About DeepWater Buoyancy, Inc.

DeepWater Buoyancy creates subsea buoyancy products for leading companies in the oceanographic, seismic, survey, military and offshore oil & gas markets.   Customers have relied on our products for over thirty-five years, from the ocean surface to depths exceeding six thousand meters.

Learn more at www.DeepWaterBuoyancy.com

About Teledyne RD Instruments

With well over 30,000 Doppler products delivered worldwide, Teledyne RD Instruments is the industry’s leading manufacturer of Acoustic Doppler Current Profilers (ADCPs) for current profiling and wave measurement applications; and Doppler Velocity Logs (DVLs) for precision underwater navigation applications. Teledyne RDI also supplies Citadel CTD sensors for a variety of oceanographic applications.

Learn more at www.teledynemarine.com/rdi/

2018 European Teledyne Marine Users Conference

2018 European Teledyne Marine Users Conference

Sponsors and Exhibitors

DeepWater Buoyancy is co-sponsoring and exhibiting at the first European Teledyne Marine Users Conference .  The event is being held in Cannes France, October 9-11.

We will be represented at the event by Dan Cote, our Sales Manager.  If attending, please be sure to stop by our exhibit table and visit with him.

 

About the Event

TMTW offers a packed, non-stop schedule that truly offers something for every level of users, from novice to seasoned pro.​

Morning sessions will be comprised of three concurrent tracks dedicated to presentations given by Teledyne users from around the globe, who will share their experiences, challenges and solutions using Teledyne products in a wide array of application areas, including:

  • Oceanographic Research
  • Hydrography
  • Offshore Energy
  • Civil Engineering / Infrastructure
  • River/Stream Monitoring
  • Security / Defense
  • Aquaculture / Fisheries​

Attendees are sure to learn new and helpful information from these sessions, not only from the speakers, but from the questions and answer, and interaction with their industry peers in these sessions.

Afternoon sessions are comprised of Teledyne Marine product / software training, new product and application introductions, Q&As with Teledyne’s technical teams, dockside and on-water demonstrations, one-on-one meetings, and an opportunity to visit with our top-tier co-spons​​ors to discuss their third party solutions and services.

Questions?  Please contact Margo Newcombe at margo.newcombe@teledyne.com.​

For more details about the conference: ClickHere

To register: ClickHere

About DeepWater Buoyancy, Inc.

DeepWater Buoyancy creates subsea buoyancy products for leading companies in the oceanographic, seismic, survey, military and offshore oil & gas markets.   Customers have relied on our products for over thirty-five years, from the ocean surface to depths exceeding six thousand meters.

Learn more at www.DeepWaterBuoyancy.com

About Teledyne Marine

Beginning as a small collection of unique marine solution providers and expanding to a powerhouse of highly engineered, high performance solutions for a broad range of markets, Teledyne Marine now offers the largest breadth of marine technology in the industry.

With technologies divided into 5 core segments; Imaging, Instruments, Interconnect, Seismic and Vehicles, Teledyne Marine sales staff can address not only brand level solutions, but turn-key, customized systems that leverage our full range of technology. Our goal is to provide one-stop purchasing capability, world-wide customer support, and the technical expertise to solve your toughest challenges.

A Sea of Solutions…..One Supplier.

Learn more at teledynemarine.com

NEW Pop-Up Buoy for EdgeTech PORT LF-SD.

NEW Pop-Up Buoy for EdgeTech PORT LF-SD.

Announcement

DeepWater Buoyancy, Inc. announces that it has developed a new Pop-Up Buoy Recovery System (PUB) for the EdgeTech PORT LF SD Acoustic Release.  Like the original product, the new PUB allows for direct retrieval of seabed packages, such as anchors, anchor lines, and bottom-mounted frames and instruments.

The new product was developed with EdgeTech’s product development team at the request of Woods Hole Oceanographic Institute.

Pop-Up Buoy Product Details

Easily mounted to any framework, the assembly sits on the seafloor until the acoustic release is activated. Once the release completes its disconnection, the buoy lifts free from the canister and rises to the surface. A synthetic line connects the buoy directly to the framework of the seabed item and allows for retrieval.

The buoy is outfitted with an electropolished 316 stainless steel frame.  The canister holds 75 meters of 1/4″ synthetic line. (Other line lengths are available upon request.) The recovery buoy is made from high-strength DeepTec® solid syntactic foam. The foam is finished with an abrasion-resistant, polyurethane elastomer coating.

The canister is made from PVC and 316SS plate. It has a rugged design and has attachment features to permit various mounting configurations, including easy mounting to our BTM-AL50 tripod bottom mounts.

To learn more about the PUB – CLICK HERE

Acoustic Release Product Details

The PORT Push Off Release Transponder is ideal for deployments in coastal environments. The mechanical drive off system is the best choice for deployments where acoustic release mechanisms can experience growth or sediment build up. Its unique push-off mechanism provides reliable release every time.

The low frequency acoustic command structure is proven to be very reliable and is unsurpassed in multi-path environments.

Features:

  • All Aluminum components
  • Simple and easy maintenance
  • Small lightweight package
  • Medium load acoustic release
  • Full transponder capability
  • 1.25 years on alkaline batteries
  • Reliable and secure command coding
  • including Enable, Disable and Release commands
  • Purge Port
  • Auto Disable
  • Tilt & Release indication

To learn more about the PORT LF SD – CLICK HERE

About DeepWater Buoyancy, Inc.

DeepWater Buoyancy creates subsea buoyancy products for leading companies in the oceanographic, seismic, survey, military and offshore oil & gas markets.   Customers have relied on our products for over thirty-five years, from the ocean surface to depths exceeding six thousand meters.

Learn more at www.DeepWaterBuoyancy.com

About EdgeTech

EdgeTech is a leading manufacturer of underwater technology solutions. The company is known worldwide for its high quality products which include: side scan sonars, sub-bottom profilers, bathymetry systems, AUV and ROV-based sonar systems, combined and customized solutions. In addition to the full line of underwater survey products, EdgeTech provides reliable USBL systems, transponder beacons, deep sea acoustic releases, shallow water and long life acoustic releases, MRUs and customized underwater acoustic command and control systems.

Learn more at www.edgetech.com

DeepWater Buoyancy in 2018 MTR100

DeepWater Buoyancy in 2018 MTR100

Announcement

DeepWater Buoyancy has again been selected for the prestigious Marine Technology Reporter “MTR100”.

Marine Technology Reporter (MTR) magazine is the world’s largest audited circulation publication serving the global Marine Technology Market. This month, MTR released its 13th Annual Listing of 100 Leading Subsea Companies.

DeepWater Buoyancy is proud to be amongst a distinguished collection of companies that include: Teledyne Marine, Kongsberg, Hydroid, and Sonardyne International, to name just a few.  In addition to being selected, a short article about DeepWater Buoyancy was included in the publication.

MTR100 Article

DeepWater Buoyancy is the world’s largest supplier of subsea buoyancy to the ocean science community. The product line is more than 35 years old and is known throughout the world and in all offshore marine markets. DeepWater Buoyancy also has a vast and growing product line of buoyancy solutions for offshore oil and gas and technology companies. Though it offers products for shallow water applications, it specializes in deepwater, providing solutions to depths of 6,000 meters and beyond.

In 2013, DeepWater Buoyancy acquired the rights and designs for the legacy Flotec material technology and products, and has been producing, improving and growing the Flotec product line. Each year the product line improves and new items are added in response to market conditions, changing technology, and customer requirements. In addition to product innovation, new processes and equipment are added to the companies already wide capabilities.

At the heart of the DeepWater Buoyancy product line are the subsurface ADCP buoys, originally developed for Teledyne RD Instruments’ ADCPs. Consisting primarily of both spherical and elliptical buoys, the product line also includes the unique StableMoor® Mooring Buoys. These torpedo-shaped buoys are engineered to house ADCPs and other sensors for high current data collection applications. By design, the StableMoor® reduces drag and increases mooring stability in extreme fl ow regimes, thereby producing superior data sets.

However, DeepWater Buoyancy’s product line goes well beyond ADCP buoys. In the oceanographic market there are bottom mounts, instrument collars, and cable floats. For offshore oil and gas, there are installation blocks, modular buoys, deepwater marker floats and ROV buoyancy. In addition to DeepTec® syntactic foam products and custom-engineered components, there are also plastic, composite, polyurethane and fabricated metal products.

DeepWater Buoyancy StableMoor® Mooring Buoy outfitted with a trim bar and carbon fiber instrument wings.

 

About DeepWater Buoyancy, Inc.

DeepWater Buoyancy creates subsea buoyancy products for leading companies in the oceanographic, seismic, survey, military and offshore oil & gas markets.   Customers have relied on our products for over thirty-five years, from the ocean surface to depths exceeding six thousand meters.

Learn more at www.DeepWaterBuoyancy.com

About Marine Technology Reporter

Marine Technology Reporter magazine is the world’s largest audited circulation publication serving the global Marine Technology Market. From offshore energy to subsea defense to science and technology, MTR covers it all.

Each issue is packed with the latest cutting edge technology from the industry’s leading companies, as well as exclusive insights and market analysis that are critical in today’s subsea industry.

If it is subsea industry related technology you seek, you will find it in Marine Technology Reporter Magazine.

Learn more at www.marinetechnologynews.com

Exhibiting at Oceans in Action

Exhibiting at Oceans in Action

Sponsors and Exhibitors

DeepWater Buoyancy is co-sponsoring and exhibiting at the Marine Technology Society’s 8th annual Oceans in Action workshop.  The event is being held in Gulfport Mississippi on August 21st and 22nd.

We will be represented at the event by Chris Kelly and Kurt Fromhertz, our sales representatives in the gulf coast.  If attending, please be sure to stop by our exhibit table and visit with them.

 

About the Event

The Oceans In Action Workshop is an annual event featuring new technologies in the maritime industry.  Day one consists of updates from federal, state, and regional organizations and new technologies that have helped their missions over the past year.  New technologies of interest to local agencies are also presented. Day two is our industry-focused day and has historically consisted of panels on current and emerging topics.  This year, resulting from a closer collaboration with the Commander, Naval Meteorology and Oceanography Command, our event is even more exciting!

Day two will begin with pier-side demonstrations of select technologies associated with the Advanced Navy Technology Exercise (ANTX). Workshop participants will be shuttled to the Port of Gulfport to watch staged demonstrations of new technologies, review results of exercises recently held in the Gulf of Mexico, and to tour recently-completed facilities, including the new University of Southern Mississippi (USM) Marine Research Center.  Participants will be shuttled back for luncheon presentations, a panel on the Blue Economy, and Business-to-Business/Business-to-Government meetings.

Highlights

  • Keynote Addresses by leading State and Navy Officials
  • Tours of the new USM Marine Research Center
  • Pierside demonstrations associated with the Advanced Naval Technology Exercise (ANTX): Gulf Coast
  • Blue Economy Panels: BlueTech Clusters and Finding Seed/Venture Capital
  • B2B/B2G meetings with federal agency representatives and large prime contractors

Speakers from the following agencies:

  • Commander, Naval Meteorology and Oceanography Command (CNMOC)
  • Naval Research Laboratory – Stennis Detachment (NRL)
  • NOAA’s National Data Buoy Center (NDBC)
  • NOAA’s National Centers for Environmental Information (NCEI)
  • USGS Hydrologic Instrumentation Facility (HIF)
  • USM’s School of Ocean Science & Technology/USM’s Marine
    Research Center
  • The U.S. Integrated Ocean Observing System (IOOS)

For additional information contact Laurie Jugan at laurie.jugan@usm.edu

To register: ClickHere

About DeepWater Buoyancy, Inc.

DeepWater Buoyancy creates subsea buoyancy products for leading companies in the oceanographic, seismic, survey, military and offshore oil & gas markets.   Customers have relied on our products for over thirty-five years, from the ocean surface to depths exceeding six thousand meters.

Learn more at www.DeepWaterBuoyancy.com

DeepWater Buoyancy Grows Sales Team

DeepWater Buoyancy Grows Sales Team

Announcement

DeepWater Buoyancy is pleased to announce and welcome Wes Bilodeau to the sales team. Wes comes with a degree in environmental design, and experience in manufacturing and technical sales.

As a Sales Engineer, Wes will provide support to the growing international and Gulf Coast clientele and representative networks. Additionally, he will work with the engineering team on new product development and commercialization.

Wes will be part of the US-based sales team led by Dan Cote, Sales Manager.  Dan has almost 30 years of experience in subsea buoyancy for oceanography and oil & gas.

About DeepWater Buoyancy, Inc.

DeepWater Buoyancy creates subsea buoyancy products for leading companies in the oceanographic, seismic, survey, military and offshore oil & gas markets.   Customers have relied on our products for over thirty-five years, from the ocean surface to depths exceeding six thousand meters.

Learn more at www.DeepWaterBuoyancy.com

DeepWater Buoyancy Selected for Maine Technology Asset Fund Grant

DeepWater Buoyancy Selected for Maine Technology Asset Fund Grant

Announcement

The Maine Technology Institute announced today that DeepWater Buoyancy, Inc. was selected to receive a grant as a part of the Maine Technology Asset Fund 2.0 program.

The company’s proposal was one of 18 chosen from a pool of 183 in a highly competitive selection process.

About the Grant

Brian Whitney, President of MTI stated, “The Maine Technology Institute (MTI) recently closed its Maine Technology Asset Fund 2.0 (MTAF2.0) application portal and announced that it received 183 proposals from Maine companies and organizations seeking, in aggregate, $381 million in funding.”  The MTAF2.0 program was established to enable organizations to gain and hold market share, to increase revenues, and to expand employment or preserve jobs.

In total, forty-five million dollars ($45,000,000) is being distributed in the form of matching grants to support infrastructure, equipment and technology upgrades.  These MTAF2.0 investments are expected to have a monumental impact on the State of Maine over the next five years, creating over 5,300 new jobs and resulting over $1.3 billion in economic impact.

Expanding Products and Markets

David Capotosto, Director of Business Development, commented, “DeepWater Buoyancy is seeing opportunities for new products in existing markets and demand for our products in new markets.  As such, a substantial capital investment program has begun to upgrade facilities, add equipment, and introduce new processes.  These improvements will also ensure the ongoing support of our existing customers and markets, and allow us to service customers in new applications and markets.” In the proposal for the grant DeepWater Buoyancy noted that they are involved in three of the seven key technology sectors targeted by the Maine Technology Institute (MTI); Aquaculture & Marine, Advanced Composites, and Precision Manufacturing.

Product Opportunities

DeepWater Buoyancy, Inc. has been the world’s largest producer of subsea buoyancy products for the oceanographic industry since its inception in 2013.  Additionally, the company has a vast line of buoyancy solutions for offshore oil & gas, government research, defense, aquaculture and marine markets.  The capital investment program is aimed at facilitating the growth of this line.

The growing line of products is the result of close collaboration with customers and a dedication to application-specific product design and development.  The company’s design philosophy is, “A customer should have a product that meets the application, and not be forced to adjust their application to an off-the-shelf product.”  Whether an iteration of an existing design or a completely new design, the goal is to produce the finest, most appropriate, and cost-effective solution for any given application.

About DeepWater Buoyancy, Inc.

DeepWater Buoyancy creates subsea buoyancy products for leading companies in the oceanographic, seismic, survey, military and offshore oil & gas markets.   Customers have relied on our products for over thirty-five years, from the ocean surface to depths exceeding six thousand meters.

Learn more at www.DeepWaterBuoyancy.com

StableMoor® Buoys Support Ice Studies

StableMoor® Buoys Support Ice Studies

The Right Design

DeepWater Buoyancy’s StableMoor® Mooring Buoys have been chosen to support the “Stratified Ocean Dynamics in the Artic” (SODA) initiative headed by the Office of Naval Research.

The buoys were custom-designed and built to specifications provided by the University of Washington Applied Physics Lab and the University of New Hampshire.  These buoys will support instrumentation that will map the underside of sea ice in support of the research project.

 

About the StableMoor® Buoys

The pair of StableMoor® buoys were over 12 feet (3.5 meters) long in order to house the instruments required for the deployment.  Each unit was equipped with features to allow for an upward-facing ADCP, upward facing sonar, a velocimeter, and three battery housings.  Each unit provides 475 lbs (215 kgs) of buoyancy and is rated for 750 msw.

This product was chosen by the research team because of its unique performance characteristics. Specifically engineered for high current applications, the StableMoor® is designed to reduce drag and increase mooring stability in extreme flow regimes. By decreasing frontal area (compared to a standard spherical buoy) and increasing dynamic stability in high current areas, the StableMoor® minimizes mooring inclination and excursions.

Learn more about the comparison of buoy shapes in differing flow regimes HERE

Learn more about our StableMoor® buoys HERE

The University of Washington team is well acquainted with the value of the StableMoor® design.  These two buoys add to their existing units that they have been working with for the past three years.  Some of these buoys previously supported a challenging NREL project studying high flow/turbulence sites for subsea turbines.

Learn about the NREL application HERE

About the Research Project

From the research paper “Stratified Ocean Dynamics of the Arctic: Science and Experiment Plan – Technical Report APL-UW 1601”, September 2016, by Craig M. Lee et al.

Vertical and lateral water properties and density structure within the Arctic Ocean are intimately related to the ocean circulation, and have profound consequences for sea ice growth and retreat as well as for propagation of acoustic energy at all scales. Our current understanding of the dynamics governing arctic upper ocean stratification and circulation derives largely from a period when extensive ice cover modulated the oceanic response to atmospheric forcing, resulting in weak seasonality, at least within the deep basins.

Recently, however, there has been significant arctic warming (Overland et al., 2016), accompanied by changes in the extent, thickness distribution, and properties of the arctic sea ice cover. Summertime sea ice extent has been declining since at least 1979 (when satellite-borne passive microwave sensors began providing comprehensive ice maps; Perovich et al., 2012), with a trend of –13.4% per decade relative to the 1981–2010 average (Figure 1; Perovich et al., 2015; Thomson et al., 2016). September sea ice minimum extents from 2007–2015 are the lowest in the 1979–2015 period, with a record minimum of 3.39 million sq km in 2012.

Figure 1. Time series of Northern Hemisphere sea ice extent anomalies in March (the month of maximum ice extent) and September (the month of minimum ice extent). The anomaly value for each year is the difference (in %) in ice extent relative to the mean values for the period 1981–2010. The black and red dashed lines are least squares linear regression lines. The slopes of these lines indicate ice losses of –2.6% and –13.4% per decade in March and September, respectively. Both trends are significant at the 99% confidence level. From Perovich et al. (2015).

Sea ice has become younger alongside the decreases in extent (Figure 2). Sea ice thickness typically increases with age, such that the combined trends toward decreasing extent and younger mean age point to a persistent loss of sea ice volume (Kwok et al., 2009; Schweiger et al., 2011). Thinner, younger ice tends to be weaker, more subject to deformation and fracturing, and thus more mobile and more likely to provide efficient coupling between the atmosphere and upper ocean. Furthermore, the growing summertime expanses of open water provide periods when the dynamics might more closely resemble those that govern the upper ocean at lower latitudes.

The need to understand these changes and their impact on arctic stratification and circulation, sea ice evolution, and the acoustic environment motivate the Office of Naval Research (ONR) Stratified Ocean Dynamics of the Arctic Departmental Research Initiative (SODA DRI).

Figure 2. A time series of sea ice age in March from 1985 to the present (top) and maps of sea ice age in March 1985 (lower left) and March 2015 (lower right). From Perovich et al. (2015).

Download the full technical report HERE

Learn more at the research project website HERE

About DeepWater Buoyancy, Inc.

DeepWater Buoyancy creates subsea buoyancy products for leading companies in the oceanographic, seismic, survey, military and offshore oil & gas markets.   Customers have relied on our products for over thirty-five years, from the ocean surface to depths exceeding six thousand meters.

Learn more at www.DeepWaterBuoyancy.com

Sponsoring the MTS Buoy Workshop 2018

Sponsoring the MTS Buoy Workshop 2018

Sponsors and Exhibitors

DeepWater Buoyancy is co-sponsoring and exhibiting at the 12th Annual MTS Buoy Workshop.  The event is from April 9-12 in the University of Michigan Campus in Ann Arbor, Michigan. Hosts this year are the National Oceanic and Atmospheric Administration Great Lakes Environmental Research Laboratory (GLERL), the Cooperative Institute for Great Lakes Research (CIGLR), and the Great Lakes Observing System (GLOS).

If attending, please be sure to come and meet Dan Cote, Sales Manager.

 

Event Details from MTS

It’s all about making critical measurements offshore, and getting data from the oceans and lakes back to shore“.

We are inviting all to join us for the 12th MTS Buoy Workshop at the Michigan League, located on the University of Michigan Campus in Ann Arbor, Michigan, during 9-12 April.  We welcome presenters and exhibitors.

As always, we welcome manufacturers and distributors of components and instrumentation for oceanographic buoy systems to exhibit at the workshop, inviting them to display and discuss their products. Interaction between the workshop attendees and these organizations prove to be beneficial to both.

Our hosts this year are the National Oceanic and Atmospheric Administration Great Lakes Environmental Research Laboratory (GLERL), the Cooperative Institute for Great Lakes Research (CIGLR), and the Great Lakes Observing System (GLOS).

We will open with an Ice-Breaker on Monday night, April 9th at the Graduate Ann Arbor Inn, one of our host hotels in Ann Arbor. The Speaker Program begins at 8 am on Tuesday, April 10th.”

  • Abstract Deadline – Friday, March 9, 2018
  • Early Workshop Registration – Friday, March 2, 2018
  • Exhibitor Application Deadline – Friday, March 2, 2018
  • Early Hotel Discounted Rate at the Graduate Ann Arbor and The Inn at the Michigan League – Friday, March 16, 2018
  • Power-Point Presentations Due – Friday, April 2, 2018

For more information contact Judy… jrizoli@whoi.edu

Or learn more about the event HERE

Send us an email to schedule a visit at the show with DeepWater Buoyancy’s Sales Manager … sales@deepwb.com

About DeepWater Buoyancy, Inc.

DeepWater Buoyancy creates subsea buoyancy products for leading companies in the oceanographic, seismic, survey, military and offshore oil & gas markets.   Customers have relied on our products for over thirty years, from the ocean surface to depths exceeding six thousand meters.

Learn more at www.DeepWaterBuoyancy.com

IN PRINT – Apprenticeship Program

IN PRINT – Apprenticeship Program

Local News

DeepWater Buoyancy was found In Print in Monday’s edition of the Portland Press Herald.  The regional paper highlighted the company’s participation in an apprenticeship program with the local technical school.  As a company staging for future growth, locating and developing skilled personnel is essential.  As such, the company is investing in local students as they begin their journey into the workforce.

Download a PDF of the article HERE    …or read the full text of the article below.  We were also featured on television news.  The video can be seen below the article.

Article

BIDDEFORD — Each weekday morning, Sam Roy heads to work. Alongside experienced welders at DeepWater Buoyancy, he spends five hours polishing, bending and cutting metal. Then he clocks out and heads to class at Biddeford High School.

Sam Roy, left, and Joe Woods prepare parts to be welded at DeepWater Buoyancy. Co-owner Matthew Henry said welders are in short supply. “The best thing we can do for him is show him all the skills he’ll need beyond welding,” Henry said.

Roy’s paid internship at the Biddeford manufacturer of sub-sea buoyancy products is a first for the company and the Biddeford Regional Center of Technology, and is an example of how Maine schools can prepare students to take advantage of a large, unmet demand for workers in the trades.

However, the arrangement wasn’t possible when Roy, 17, first discovered his love for welding because of state labor laws that prohibited teens from working with hazardous machinery. Roy and a bipartisan group of lawmakers first had to change those labor laws.

The revisions to the Hazardous Occupations Law for Minors allow students to work and earn money while enrolled in a cooperative or vocational training program. The changes added an exemption for students under 18 enrolled in a career and technical education – or CTE – program to work for short periods of time under the direct supervision of a fully qualified and experienced adult. The rules require the CTE program to provide basic safety training to students and to continue to oversee students’ education.

Sen. Amy Volk of Scarborough, who proposed the amendment with Reps. Martin Grohman and Ryan Fecteau of Biddeford, said the changes benefit both students and local businesses like DeepWater Buoyancy that are trying to attract skilled workers.

“Welding is a talent that is incredibly important to industry in Maine. That’s why, as a committee, we felt it was important to do everything we could to enable the next generation of students interested in a technical career path such as engineering, plumbing, automotive or nursing, to name a few, to succeed,” said Volk, Senate chairwoman of the Legislature’s Labor, Commerce, Research and Economic Development Committee.

The concept of matching students with local companies isn’t new at the Center of Technology or at the 26 other career and technical education schools around the state, but educators and tradesmen say changes were necessary to give students the experience they need to enter the workforce and fill gaps in trades that have a hard time attracting new workers.

“In the past 20 years, I’ve seen such a great need for skilled labor,” said Jim Godbout, owner of Jim Godbout Plumbing and Heating. “There used to be a lot of families going into the same trade for generations, but you don’t see much of that anymore.”

Building Industry Labor Shortage

There are now more people in Maine aging out of the workforce than entering it because of a large drop in the number of births after the 1980s, according to the Maine Department of Labor. That has left gaps in some industries that are not attracting as many skilled workers as needed.

Those gaps are felt especially hard in the building industry, where the average age of plumbing and heating contractors is now over 55.

“They’re retiring and no one is coming into the trades,” said Alice Ames, executive director of the Plumbing-Heating-Cooling Contractors Association of Maine.

Paulette Bonneau, director of the Center of Technology, said internships allow students to gain real-world experience while also exposing them to career opportunities they can pursue without leaving the state.

“They see there are a lot of cool things happening in Maine they can be a part of. This is key for us in the state,” she said. “There are so many neat things going on in the industry here in Maine.”

Skills Not Learned in School

 Last year, over 90 percent of Maine CTE high school students graduated, compared with 60 percent of their peers, according to a study by Educate Maine and the Maine State Chamber of Commerce. Many students leave CTE centers with industry-recognized certifications and technical certificates that allow them to go right to work out of high school. Some of those certifications can be carried over as credits in college.

The Biddeford Regional Center of Technology is open to students from Biddeford High School, Thornton Academy and Old Orchard Beach High School. It offers 16 courses of study ranging from welding-metal fabrication to early childhood education to business and financial management.

The center last year added a plumbing program that now includes more than a dozen students.

“This is not your grandfather’s vocational school,” Bonneau said. “The technology high school setting of today is focused on academic rigor, work ethic and people skills that traditional high school students often are not exposed to.”

Roy was introduced to the Center of Technology during a technology course he took as a sophomore. The teacher taught Roy and his classmates about multiple options at the center, but it wasn’t until a trip to the welding class that Roy’s interest was truly sparked.

“Something just clicked,” said Roy, who comes from a family of toolmakers and machinists. “I found it more interesting and unique than anything I’d done before.”

Roy said he felt energized to study welding and threw himself into the course during his junior year. Last year, he became the first junior at the tech center to obtain an American Welding Society certification.

Matthew Henry, co-owner and plant manager of DeepWater Buoyancy, said good welders in Maine are in short supply and the company was happy to partner with the Center of Technology so it could bring Roy to work.

“He’s essentially just another employee,” Henry said. “The best thing we can do for him is show him all the skills he’ll need beyond welding.”

Roy doesn’t have the welding skills necessary to do the same work as experienced DeepWater Buoyancy employees, but he said he is constantly learning from his mentor and other workers when he’s on the job. He undergoes the same extensive safety training and also is learning about things like blueprints.

Roy, who will attend Eastern Maine Community College after graduation, said he believes his future career in welding will allow him to stay in Maine or bring him to places like Canada and Alaska to work as a pipefitter.

“With other jobs I’ve had, it doesn’t have the same level of satisfaction of getting something done that benefits other people,” he said.

A Plumbing Career Blooms

The labor law change also allowed Jackson Oloya, a 17-year-old second-year plumbing student, to start a paid internship at Jim Godbout Plumbing and Heating in Biddeford.

Since January, Oloya, a senior from Biddeford High, has spent up to 24 hours a week working with Godbout’s more experienced employees. He earns $12 an hour, but that could go up by $1 or $2 an hour by the end of the summer as he learns new skills.

So far, Oloya’s work has included fixing toilets, repairing a commercial shower at the YMCA and helping a service technician identify and address home heating problems.

After working from 7:30 a.m. to 11:30 a.m., he returns to school for classes and to play basketball.

“He’s not just working, he’s doing,” Godbout said. “He’d love to work a lot more and we’d love to have him. He’s super eager to learn.”

Oloya started in the plumbing program at the center during its first year. It was interesting, he said, but it wasn’t until the hands-on part of the course began that he really got excited about his future career.

“I’m not a person who stays in an office all day. I like to put things together,” he said. “I thought of myself 10 years from now and said, ‘I can do this.’ ”

Investing in Young People

Oloya, who was born in Uganda and moved to the United States 15 years ago, said he has found he most enjoys doing repair work because it allows him to help customers directly. He also likes the idea that he can pursue a career in the community where he already lives with his mother and 10 siblings.

In the fall, Godbout will pay for Oloya to attend a 12-week advanced training program with the Maine Energy Marketers Association. Godbout said he is willing to invest in young people like Oloya who have a strong work ethic and are serious about building a career with his company.

Oloya and Godbout will sign a contract saying Oloya will continue working for the company after his training.

“It’s a great opportunity,” Oloya said. “I’m getting my brain working a lot. I’ll learn lots of new skills and I like that a lot.”

Godbout said he is encouraged to see more students becoming interested in the industry, and he thinks the opportunities for paid internships will grow “by leaps and bounds” because so many plumbers and electricians are eager to work with young people getting into the industry.

“It’s a great opportunity for these students,” he said. “You can’t buy an education like that.”

And on TV

The story was also run in video as well.

About DeepWater Buoyancy, Inc.

DeepWater Buoyancy creates subsea buoyancy products for leading companies in the oceanographic, seismic, survey, military and offshore oil & gas markets.   Customers have relied on our products for over thirty-five years, from the ocean surface to depths exceeding six thousand meters.

Learn more at www.DeepWaterBuoyancy.com

Representative Spotlight – ASB Systems in India

Representative Spotlight – ASB Systems in India

DeepWater Buoyancy has the finest international representative network for oceanographic subsea buoyancy.  What follows is the next in a series of articles on our representative groups.  This time we are highlighting our representative in India – ASB Systems Pvt Ltd.  Founded in 1995, ASB is another of our representatives who have many years of experience integrating our buoyancy solutions into subsea moorings and structures. ASB services our customers in this region such as the National Institute of Oceanography and the National Centre for Antarctic & Ocean Research.

 

Introduction

ASB Systems was formed in 1995, with a vision to become a multifaceted company in promoting and setting up a strong foundation for a variety of marine related products. The mission is to build and strengthen the foundation of our principals in the Indian market by creating a perfect passage between principal and the end-user. Since inception, the Company has focused on two key issues: the sale of quality products followed by equally good quality post sale support to ensure maximum uptime and utilization of systems. This, in turn, has attracted high levels of customer appreciation for our timely and efficient service.

Representation

We are the authorized sales and service representative of some of the leading manufacturers of Hydrographic and Oceanographic equipment. Our principals are:

  • Teledyne RD Instruments, USA – Acoustic Doppler Current Profiler
  • Hemisphere GNSS,USA – DGPS
  • Hypack, USA – Hydrographic Survey Software
  • Teledyne Odom Hydrographic, USA – Multi-beam & Single Beam Echo Sounders
  • Wartsila ELAC Nautik GmbH, Germany – Multi-beam Echosounders
  • Teledyne Benthos, USA – Acoustic Modems & Releases, Glass Floats
  • SMC Ship Motion Control, Malta – Motion Sensors
  • SBG Systems, France – MEMS IMU
  • SevenCs, Germany – Electronic Charts
  • CODAR Ocean Sensors, USA – Ocean Surface Current & Wave Monitoring
  • Coda Octopus Products Ltd, UK – Echoscope & IMU
  • Deepwater Buoyancy, USA – Subsea Buoyancy Products
  • Innomar Technologies GmbH, Germany – Sub Bottom Profiler
  • Nke Instrumentation, France – Multi-parameter Probes
  • dotOcean NV, Belgium – Instruments for Sediment and Density Measurement

Location and Staff

The Company owns its only premises in Mumbai, in order to maintain strict quality control on our service and have expertise at one point.  ASB Systems is known among Indian clients as a company which delivers quality product and support.  The Service Centre has test equipment (both specialized and normal), documentation, and necessary tool and test equipment to diagnose & repair equipment that ASB sells. The service engineers are periodically trained at our principals’ plants to update their technical skills in order to support contracts, improve troubleshooting, and help in our sales effort.   ASB engineers are responsible for setting high standards of customer support. As a result, the group has always added to the client list and has rarely lost a client.

Services Offered

Sales – Representing OEMs in India for marine research instruments

Warranty Support – To provide service support during warranty period on behalf of OEM

Installation – Installation, Commissioning and Training

Maintenance – Service, Support, Troubleshooting, and Repairs

Our Engineers have the expertise to diagnose defects and provide solutions. Warranty support is provided with clear guidance and support from our principals. Spares as and when required can be arranged ensuring that the lead-time is minimized. ASB Systems also provide Annual Maintenance Contracts for the systems we sell.  ASB engineers keep themselves updated through self-learning programs as well as training organized at the OEM factories.

Over the years, we have provided services to government and private organizations in our field of operation. Effective and efficient support is our prime objective and we make conscious effort to satisfy our customers. We have a long experience in supplying oceanographic products including deep water buoys, ADCPs, acoustic modems, and acoustic releases. Our engineers possess the expertise to integrate these subsea devices and have been ably supporting our esteemed customers for such applications. Whether it is calculating the deployment duration of an ADCP and modem to ensure that the batteries last through the deployment, or addressing a requirement to acquire real-time data from subsea instrumentation, ASB Systems has been proactively providing support for every type of application.

Markets

Principle markets for the company include land and marine survey companies, harbours, container ports, universities, government marine institutes, fish farms, OEM system integrators, dredging contractors, super yachts, racing yachts, marine archaeology, ROV and autonomous underwater/surface vehicles, pilotage, TV outside broadcast, precision agriculture, and fellow marine equipment suppliers and rental organisations.

Our Team Our Strength

Pop-Up Buoy Product Image

Contact ASB Systems Pvt. Ltd.

Gopa Williams   |   gopa@asbsystems.net  |   +91 22 4230 1919 / 1927
www.asbsystems.co.in

About DeepWater Buoyancy, Inc.

DeepWater Buoyancy creates subsea buoyancy products for leading companies in the oceanographic, seismic, survey, military and offshore oil & gas markets.   Customers have relied on our products for over thirty-five years, from the ocean surface to depths exceeding six thousand meters.

For further sales information:  Dan Cote, Sales Manager  |  sales@deepwb.com  |  +1 207 502 1400

For further company information:  David A. Capotosto |  davidcap@deepwb.com  |  +1 207 468 8545

Exhibiting at Oceanology International 2018

Exhibiting at Oceanology International 2018

Show News

DeepWater Buoyancy is exhibiting at Oceanology International 2018 in London, UK.  The conference is from March 13-15 at the ExCel London conference center.  Please come visit us at Stand C353 and meet Dan Cote, Sales Manager, and David Capotosto, Director of Business Development.

Oceanology International is an exhibition and conference designed to bring together marine professionals, businesses and organizations to improve their strategies for measuring, developing, protecting and operating in the world’s oceans.

 

 

Learn more HERE

Send us an email to schedule a visit with us at the show… sales@deepwb.com

DeepWater Buoyancy Exhibitor Information HERE

About DeepWater Buoyancy, Inc.

DeepWater Buoyancy creates subsea buoyancy products for leading companies in the oceanographic, seismic, survey, military and offshore oil & gas markets.   Customers have relied on our products for over thirty years, from the ocean surface to depths exceeding six thousand meters.

Learn more at www.DeepWaterBuoyancy.com

IN PRINT – “From the Field”

IN PRINT – “From the Field”

Editorial Focus

DeepWater Buoyancy was found In Print in the December Issue of the Ocean News and Technology.  The article was an Editorial Focus entitled “From the Field”.  It is a question and answer session with DeepWater Buoyancy’s Director of Business Development, David Capotosto.

Download a PDF of the article HERE

…or read the full text of the article below.

The Article – From the Field

Could you give us some company history?

To understand our company history, I have to take you back to 1979.  In that year, David Cook founded Flotation Technologies (Flotec) to produce subsea buoyancy products made from syntactic foam.  Mr. Cook was one of the inventors of syntactic foam and had been working with it for over a decade.  He and his family grew Flotec into a leader in oceanographic buoyancy products, pioneering buoyancy for instruments like ADCPs and transponders. In the early 2000s, the company proceeded to develop and to produce best-in-class oil and gas subsea products, including drill riser buoyancy and distributed riser & umbilical buoyancy, arguably some of the most challenging subsea foam products.

Flotec was acquired in 2008 by a Houston-based subsea equipment and service provider.  In 2013, DeepWater Buoyancy acquired the rights and designs for the legacy Flotec material technology and products when its parent company was in the process of closing the New England facility. Since then, DeepWater Buoyancy has been producing, improving and growing the Flotec product line, which has been the industry standard for decades.

What are your standard products?

Our standard product line is vast and covers applications in numerous markets.  It is, of course, principally subsea buoyancy, but also includes related, subsea deployment products.

At the heart of the DeepWater Buoyancy product line are the subsurface ADCP buoys.  These buoys, originally developed for Teledyne RD Instruments’ ADCPs, are considered the gold standard within the industry.  Consisting primarily of both spherical and elliptical buoys, the product line also includes the unique StableMoor® Mooring Buoys.  These torpedo-shaped buoys are engineered to house ADCPs and other sensors for high current data collection applications.  By design, the StableMoor® reduces drag and increases mooring stability in extreme flow regimes, thereby producing superior data sets.

 

However, DeepWater Buoyancy’s product line goes well beyond ADCP buoys.  In the oceanographic market there are bottom mounts, instrument collars, and cable floats.  For offshore oil & gas, there are installation blocks, modular buoys, deepwater marker floats and ROV buoyancy.  In addition to DeepTec® syntactic foam products and custom-engineered components, there are also plastic, polyurethane and fabricated metal products for use subsea.

We continue to develop the standard product line as projects and opportunities arise.  Recently we have added mooring line fairings, a new modular installation buoy and a pop-up buoy recovery system.

What have been some of the challenges?

One of the largest challenges we face is lead time.  There has always been downward pressure in this area.  But with the changes in the O&G market, it seems to have intensified.  Overall project timelines are shortened and this, coupled with other factors, can affect procurement schedules.

And of course, when designing a system, buoyancy is often the last item to be specified, as the balance of the system’s weight needs to be characterized before uplift can be calculated.

Could you talk about an especially challenging case study?

We were contacted by a large offshore services provider preparing to do a large metocean study in Brazil for a subsea oil production site.  They had been awarded the contract but needed seven of our 64” diameter elliptical buoys.  Additionally, they needed to have the buoys customized.  In order to meet their deployment timeline, they asked us to produce them in half of the time that would normally be required.

How did you overcome those challenges?

Integral to our business and manufacturing strategy is the ability to execute almost all the required manufacturing processes in house.  That means we have control of the sequence of operations and can expedite internally, as opposed to relying on and pressuring outside subcontractors.

Our operations team was engaged in the challenge and rose to it.  The systems were delivered on time to the customer and allowed them to deploy on schedule.

What are your largest market sectors?

Our largest markets are oceanographic and military/government.  Additionally, we have been strong in the offshore oil & gas market and are looking to see growth in that market as the industry recovers.

What have been some of your custom products?

I am glad you asked this question. Custom products are certainly a strong suit of ours.

Often a client can’t find their ideal solution in the product line.  Sometimes it is simply a matter of customizing some feature of a standard product.  But often it requires our team to start with a clean sheet of paper – or perhaps better stated – a new solid model file.  Either way, we will design and produce a custom product to meet the requirement.

The company’s design philosophy is, “A customer should have a product that meets the application, and not be forced to adjust their application to an off-the-shelf product.”  Whether an iteration of an existing design or a completely new design, the goal is to produce the finest, most appropriate, and cost-effective solution for any given application.

Part of the strength of this custom offering is our engineering team with state-of-the-art CAD/CAM technology.  But it also includes the vast manufacturing capability and know-how in house.  We have a wide assortment of internal manufacturing processes and tools; from foam manufacturing, to welding, to machining, to urethane spray coating.  And we have a seasoned staff of capable technicians with decades of experience with these processes and these product lines.

Using this approach, we have produced everything from small components for AUVs, to acoustic baffles, to custom buoyancy blocks for the OOI project that are the size of a small automobile.

One recent example

The National Oceanographic Centre (NOC) in Southampton UK approached us with a requirement for a 6000m benthic lander for the RAPID array project.  RAPID ARRAY has been deploying bottom pressure recorders across the Atlantic since 2004.  The NOC team wanted to address issues in previous designs and make improvements.

We worked closely with them to design a new system from scratch using solid modeling.  The system included buoyancy, framework, instrument clamps and hardware.  The lander is dropped to the seafloor where it collects data.  The product is equipped with a dual acoustic release system which allows it to drop ballast when it is time for recovery.  Once the ballast is dropped, the system is positively buoyant and returns to the surface.

The product was jointly developed and the system was built entirely in our facility.  NOC integrated all the instruments and deployed in Spring of this year.  Recovery is planned for Spring of 2020.

 

Have there been any AHA moments?

Along the way there have certainly been some “AHA moments”.  Those moments, when related to products, are often a result of collaboration with the gifted ocean scientists, ocean engineers and the numerous instrument manufacturers with whom we work.

There have also been a few material science “AHAs”.  After all, at the center of what we do is the development of syntactic foam, that amazing material that provides buoyancy but resists being crushed by the pressure of ocean depths.  Of course, I can’t share those moments with you as our syntactic foam technology is proprietary.

What have been some of the most interesting projects?

Our StableMoor® buoy has provided us with some interesting applications.  It is a product that allows for a stable mooring to gather data in high current sites.  Last year the National Renewable Energy Laboratories and the University of Washington used the product in a unique way to study turbulence in potential site of subsea turbines for renewable energy production.  Understanding turbulence is important in these sites as turbulence places stress on the turbine blades.

Read a related article  HERE   –   Download a copy of the NREL paper HERE

The product was fascinating in that the buoy housed a number of instruments, the primary instruments were the turbulence sensors.  To get the data that was required, there was a turbulence sensor placed in the nose of the buoy.  But there were also two additional sensors placed at the end of special carbon-fiber wings.

These kinds of projects are interesting because they challenge us to produce unique and robust designs and because they take our buoys to some of the most hostile and chaotic areas of the ocean and in the midst of that difficult environment, support the gathering of important data.

About DeepWater Buoyancy, Inc.

DeepWater Buoyancy creates subsea buoyancy products for leading companies in the oceanographic, seismic, survey, military and offshore oil & gas markets.   Customers have relied on our products for over thirty years, from the ocean surface to depths exceeding six thousand meters.

Learn more at www.DeepWaterBuoyancy.com

IN PRINT – Pop-Up Buoy Recovery System

IN PRINT – Pop-Up Buoy Recovery System

New Product

DeepWater Buoyancy was found In Print in the December Issue of the Ocean News and Technology.  The article was a New Product Announcement for the Pop-Up Buoy Recovery System.

See a PDF of the printed article HERE

See the original announcement post HERE

About DeepWater Buoyancy, Inc.

DeepWater Buoyancy creates subsea buoyancy products for leading companies in the oceanographic, seismic, survey, military and offshore oil & gas markets.   Customers have relied on our products for over thirty years, from the ocean surface to depths exceeding six thousand meters.

Learn more at www.DeepWaterBuoyancy.com

IN PRINT – Don’t Let the Ocean Knock You Down

IN PRINT – Don’t Let the Ocean Knock You Down

Article

DeepWater Buoyancy was found In Print in the December Issue of the Marine Technology Reporter.  The article was called “Don’t Let the Ocean Knock You Down”.  Written by Dean Steinke of DSA, the article is a print version of the DeepWater Buoyancy Mooring Matters article, Mooring System Numerical Modeling.

In the article, Dean discusses the role of finite element-based simulation and visualization software in mooring design.

See a PDF of the printed article HERE

See the Mooring Matters post HERE

Watch the simulation video HERE

 

About DeepWater Buoyancy, Inc.

DeepWater Buoyancy creates subsea buoyancy products for leading companies in the oceanographic, seismic, survey, military and offshore oil & gas markets.   Customers have relied on our products for over thirty years, from the ocean surface to depths exceeding six thousand meters.

Learn more at www.DeepWaterBuoyancy.com

NEW Pop-Up Buoy Recovery System

NEW Pop-Up Buoy Recovery System

Announcement

DeepWater Buoyancy, Inc. announces that it has developed a Pop-Up Buoy Recovery System (PUB) and added it to their line of subsea buoyancy products. The PUB allows for direct retrieval of seabed packages, such as anchors, anchor lines, and bottom-mounted frames and instruments.

The new product was introduced in October at the 2017 Teledyne Marine Technology Workshop in San Diego, California.  It was well-received by representatives, distributors, partners, and end-users.

“We are excited to add the pop-up system to our product line,” said Dan Cote, Sales Manager.  “It gives our customers yet another buoyancy tool for deploying and recovering subsea equipment.”

Pop-Up Buoy Product Details

Easily mounted to any framework, the assembly sits on the seafloor until the acoustic release is activated. Once the release completes its disconnection, the buoy subassembly lifts free from the canister subassembly and rises to the surface. A synthetic line connects the buoy directly to the framework of the seabed item and allows for retrieval.

The standard recovery system is designed to work with both the legacy Teledyne Benthos 875 shallow water release, as well as the new R500 series release. Though this model is built specifically for the Teledyne Benthos acoustic releases, the company can also fit the design to releases from any manufacturer.

“This year Teledyne Benthos discontinued its long-standing product offering, the PUB-875,” explained David Capotosto, Director of Business Development. “This left our distributors and the end users in a supply dilemma.  We saw this change and the introduction of the new R500 release from Benthos as an opportunity to serve our clients and, at the same time, to improve the concept.  As with all DeepWater Buoyancy designs, the unit is thoughtfully designed and ruggedly-built for the offshore environment.”

Learn More

Learn more about the Pop-Up Buoy Recovery System HERE

See all our product types HERE

Download a datasheet HERE

Pop-Up Buoy Product Image

About DeepWater Buoyancy, Inc.

DeepWater Buoyancy creates subsea buoyancy products for leading companies in the oceanographic, seismic, survey, military and offshore oil & gas markets.   Customers have relied on our products for over thirty-five years, from the ocean surface to depths exceeding six thousand meters.

For further sales information:  Dan Cote, Sales Manager  |  sales@deepwb.com  |  +1 207 502 1400

For further company information:  David A. Capotosto |  davidcap@deepwb.com  |  +1 207 468 8545

 

Pop-Up Buoy with Syntactic Foam Collar removed showing Teledyne Benthos R500 Acoustic Release

PUB-875 PUB-R500 Benthos
PUB-875 PUB-R500 Benthos

 

Pop-Up Buoy Recovery System with Teledyne Benthos Acoustic Release installed.

PUB-875 PUB-R500 Benthos
PUB-875 PUB-R500 Benthos