ADCP Deployment Products Archives

2026 Buoy Workshop

Mar 16, 2026

Exhibiting

DeepWater Buoyancy is exhibiting at the 16th MTS Buoy Workshop.

The event is being held March 23-26 at The University of South Florida, St. Petersburg Campus, College of Marine Science.

Event Details from MTS

You are cordially invited to join us for the 16th MTS Buoy Workshop sponsored by the Marine Technology Society (MTS) to present and share your buoy-related work and projects to all attendees.

Since the 1960s, these workshops have covered the technology of oceanographic, weather, and other buoy systems. Originally based on the suggestion and support by the Office of Naval Research, buoy workshops have been organized and supported every two years since 1996 to foster communication and exchange between designers, assemblers, operators, and users of buoy systems.

This year’s Workshop, presented in partnership with the Florida Institute of Oceanography and the University of South Florida-College of Marine Science, begins with a pre-event seminar and workshop presented by ProteusDS on Monday afternoon, March 23, followed by an evening Ice-Breaker. The Speaker Program runs from Tuesday morning, March 24, through Thursday afternoon, March 26 (concluding around 5:00 p.m.). On Wednesday afternoon, participants will tour host facilities engaged in active buoy projects, with a networking reception to follow that evening.

Learn more about the event at MTS Buoy Workshop

At the Workshop

If attending, please be sure to visit with Dan Cote, our Sales Manager

At the event, we will be highlighting our full range of products for the ocean science community, including our line of midwater ADCP buoys.

ADCP Buoys - Spherical, Elliptical, StableMoor

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 forty five years, from the ocean surface to depths exceeding six thousand meters.

Learn more at www.DeepWaterBuoyancy.com

Oceanology International 2026

Mar 4, 2026

Exhibiting

DeepWater Buoyancy is exhibiting at Oceanology International 2026.

The event will take place from March 10-12 at the ExCel London.

About the Event

The three-day conference and exhibition runs biannually, aiming to welcome over 8,000 attendees and enable more than 500 exhibitors to showcase the latest ocean technologies and developments on the event floor, as well as on water demos and vessels.

Oceanology International is the leading forum where industry, academia and government share knowledge and connect with the world’s marine science and ocean technology communities. Learn from ocean leaders from across the globe, boost your technical and blue economy knowledge, and connect with your industry colleagues at one of our many social events.

Learn more at the website – Oceanology International London | 10–12 March 2026

At the Stand

DeepWater Buoyancy will be represented at the event by Dan Cote (Sales Manager) and Matthew Henry (President). Please come visit us at Stand H10.

At the event, we will be highlighting our full range of products for the ocean science community, including our line of midwater ADCP buoys.

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 forty five years, from the ocean surface to depths exceeding six thousand meters.

Learn more at www.DeepWaterBuoyancy.com

Product Spotlight – Instrument Bottom Mounts

Oct 7, 2025

Product Spotlight - MiniMod Small Modular Buoy

DeepWater Buoyancy is one of the world’s premier producers of subsea buoyancy products. Its portfolio of products includes standard and custom solutions for all subsea markets including ocean science, offshore energy, and military.

This month’s product spotlight focuses on DeepWater Buoyancy’s Instrument Bottom Mounts. The line of BTM-AL50 bottom mounts is designed for ADCP deployment in shallow ocean waters, rivers, coastal areas, and anywhere else where the size and remote recoverability of the AL-200 and AL-500 TRBM are not required.

Purpose-Built for Stability and Versatility

Our BTM-AL50 Instrument Bottom Mounts are designed to provide a stable platform for deploying ADCPs, current meters, and other oceanographic instruments directly on the seabed. Whether you’re working in shallow coastal waters or lakes, these mounts offer the durability and performance needed for long-term deployments.

Each Bottom Mount is constructed from high-strength, corrosion-resistant materials and is designed for ease of customization. From single-instrument setups to complex multi-sensor arrays, our mounts can be tailored to meet your specific project requirements.

Key Features

Robust Construction – Built with marine-grade aluminum for long-term durability in harsh subsea environments.
Flexible Design – Easily adaptable to accommodate a variety of instruments and deployment scenarios.
2-axis Gimbal – Precision-machined gimbal ensures ADCPs are held securely and aligned properly.
Counterweights – Optional counterweight system available for lighter instruments
Deployment Flexibility – Compatible with diver deployment, ROV handling, or over-the-side operations.
Recovery Options – Originally designed to be recovered by divers, the units can be outfitted with our Pop-Up Buoy Recovery Systems

DeepWater Buoyancy Diver-Serviceable Bottom Mount

A and B

The Instrument Bottom Mounts come in two varieties.

BTM-AL50-A

This traditional welded unit can be deployed by diver or lowered to the seafloor by line from small vessels. Instrumentation is easily accessible for battery change out or maintenance.

BTM-AL50-B

Like the traditional unit in all other ways, this robust bottom mount is collapsible for ease of transportation and lower shipping costs. The pinned and bolted design makes for a quick and easy assembly.

New Brace for Collapsible Bottom Mount

The collapsible version of the bottom mount, the BTM-AL50-B, has a number of unique benefits including ease of handling and transportation. It also allows users to deploy from smaller vessels.

Recently, we found that users were utilizing these units for applications where their greater payload would have been better suited for the welded version, the BTM-AL50-A. Our designers went to work and produced a field retrofittable and installable brace kit. Once installed, the brace increases the rigidity of the assembly rivaling the welded design.

Need a custom solution?

We specialize in adapting our designs to meet unique deployment challenges. Contact us to discuss your project and let us help you build the right bottom mount for your mission.

Contact Us
Learn More About Instrument Bottom Mounts

About DeepWater Buoyancy, Inc.

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

Learn more at DeepWaterBuoyancy.com

Exhibiting at Oceans 2024

Sep 6, 2024

Exhibiting

DeepWater Buoyancy will be exhibiting at the 2024 Oceans Conference and Exposition. The event will take place September 23-26, 2024 at the Halifax Convention Centre in Halifax, Nova Scotia.

Please visit Dan Cote (Sales Manager) and Jordan Tremblay (Sales Engineer) at Booth 304.

About the Event

OCEANS is an annual event for global marine technologists, engineers, students, government officials, lawyers, and advocates. At OCEANS 2024 Halifax, industry thought leaders gather for four days to highlight relevant topics and current trends while creating a community of learners and influencers who consistently advance research, practices, and policies for the marine field.

Learn more about the event HERE

Send us an email to schedule a visit at the show with DeepWater Buoyancy’s Sales Manager, Dan Cote. dcote@deepwb.com

Oceans Conference and Exhibition 2024 in Halifax Nova Scotia

Why We Attend

DeepWater Buoyancy is the world’s largest supplier of subsea buoyancy to the ocean science community and provides products to all offshore, subsea markets. The product line is now over 40 years old and is known throughout the world. It provides critical product design and development for even the smallest clients, sometimes producing only one custom solution. This allows all ocean engineers, project managers and scientists to get the subsea buoyancy product that is fit for their project.

Much of the work that is done in the challenging environment of deep water requires syntactic foam buoyancy. When it comes to syntactic foam, DeepWater Buoyancy is a critical partner to the offshore subsea market. Exhibiting at the Oceans conference will allow us to visit in person with end users, ocean engineers, and partner companies. It will also allow us to spend time with our international sales representatives like DASCO Equipment of Canada.

See our full product offering 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 forty-five years, from the ocean surface to depths exceeding six thousand meters.

Learn more at www.DeepWaterBuoyancy.com

Mooring Matters: StableMoor® Buoys in the Bay of Fundy

Aug 9, 2024

StableMoor Mooring Buoy in Bay of Fundy with Ocean Tracking Network Cover

For the next installment in our series of technical articles, we look at the use of StableMoor® Mooring Buoys in a recent project by Ocean Tracking Network in the Bay of Fundy.

Project Summary

DeepWater Buoyancy and DASCO Equipment Inc. partnered with the Ocean Tracking Network (OTN) to execute a major upgrade to their mooring platform for monitoring equipment in the Bay of Fundy.

OTN, in partnership with Dalhousie University, has established an acoustic system to track aquatic animals in the Bay of Fundy. Specifically, the project aims to track the effects of tidal power installations in the upper Minas passage on the local marine environment and wildlife.

Mooring Equipment Challenges in the Bay of Fundy

The Bay of Fundy is one of the world’s most dynamic bodies of water, due to its strong tidal currents. This makes it an ideal location for tidal power projects, but challenging for moorings.

In 2010 OTN deployed a series of single point moorings with fish tracking technology. Over the next decade, the project faced numerous failures related to the mooring design such as equipment breakage, destruction of the mooring hardware leading to washups, and occasional entanglement with fishing gear. Additionally, the mooring required service every six months.

In 2023 OTN partnered with DeepWater Buoyancy and DASCO Equipment to redesign the mooring platform to reduce equipment issues and frequent servicing. A major component of that redesign included the use of a custom-built version of DeepWater Buoyancy’s StableMoor® Mooring Buoy.

StableMoor® Mooring Buoy with Single Point Mooring Assembly on Deck

Photos courtesy of Joseph Pratt, Ocean Tracking Network.

The moorings capitalized on the low coefficient of drag inherent in the StableMoor® design, as well as the robustness of the syntactic foam. Durable and corrosion-resistant stainless steel chains and shackles were utilized, and the bushings and plates updated to ensure functionality in the Bay of Fundy’s extremely dynamic tidal flow.

The mooring design changes significantly improved the performance and dramatically decreased the number of mooring failures.

Weathering the Bay of Fundy with Custom StableMoor® Buoys

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 spherical buoys) and increasing dynamic stability in high current areas, the StableMoor® minimizes mooring inclination and excursions. The StableMoor® Mooring Buoy is the lowest drag instrument platform available on the market today.

DeepWater Buoyancy Small StableMoor® Buoys for Ocean Tracking Network

To meet OTN’s specific needs for the Bay of Fundy monitoring project, DeepWater Buoyancy’s engineers created a smaller version of the design with custom instrument wells and hardware. To account for changes in current direction without excessive wear, 316L stainless steel mooring swivels were chosen. The stainless steel material also provides crucial durability in highly corrosive seawater.

DeepWater Buoyancy looks forward to working with OTN and DASCO to modify and perfect the monitoring platform.

What’s Next?

In 2024 another round of improvements is planned. One of the goals of the exercise is to extend the mooring’s battery life to one year, thus reducing service frequency. The plans will also investigate equipment to allow retrieval of the anchors, which are currently left on the seafloor when the moorings are recovered.

“DeepWater Buoyancy is excited to work with our long-term partners, DASCO and the team at the Ocean Tracking Network on such important work.”, said Dan Cote, Sales Manager.

What the Ocean Tracking Network Does

Headquartered at Dalhousie University in Halifax, N.S., OTN has established an acoustic system to track aquatic animals in the Bay of Fundy. Specifically, the project aims to track the effects of tidal power installations in the upper Minas Passage on the local marine environment and wildlife.

OTN is a science, data management and partnership platform that supports research collaborations in freshwater and ocean locations across the globe. In the Bay of Fundy, OTN and its collaborators have been an integral part of monitoring fish-turbine interactions near OpenHydro turbines.

Using specialized equipment, they monitor the movements, behaviors, and environmental preferences of fish and other aquatic species. Knowledge generated through OTN collaborations is used by scientists, managers, policymakers, industry, and Indigenous and coastal communities to conserve and manage shared resources.

About DASCO Equipment

DASCO Equipment is Canada’s leader in oceanographic, hydrometric & marine survey technologies. The company’s primary business is the sales, and sales support, of this equipment, however, they also maintain a large pool of rental equipment, including acoustic doppler current profilers, multibeam and single beam echosounders, marine GPS and GNSS systems and marine survey software packages.

Learn more at www.dascoei.ca.

About DeepWater Buoyancy, Inc.

DeepWater Buoyancy, Inc., located in Maine USA, provides subsea buoyancy products for offshore energy, oceanographic, military, and technology companies around the world. Customers have relied on our products for over forty years, from the ocean surface to depths exceeding six thousand meters. Learn more at DeepWaterBuoyancy.com

Oceanology International 2024

Mar 7, 2024

Exhibiting

DeepWater Buoyancy is exhibiting at Oceanology International 2024.

The event will take place from March 12-14 at the ExCel London.

About the Event

Oceanology International brings together 500+ exhibitors in the only event that links the three key players in the industry: businesses, academics and government. At the event you will find innovative live on-water demonstrations and interactive seminars looking into the future of our industry.

With over 8,000 attendees targeted for 2024, it is a must-attend event for those involved in exploring, monitoring, developing or protecting the world’s oceans, from seabed to surface and beyond.

Join OI 2024 at Excel London to discover game-changing innovations and solutions transforming the future of ocean technology.

Learn more at the website – www.oceanologyinternational.com.

At the Stand

Deepwater Buoyancy will be represented at the event by Dan Cote (Sales Manager) and Matthew Henry (Operations Manager). Please come visit us at Stand H10.

At the event, we will be highlighting our full range of products for the ocean science community, including our line of midwater ADCP buoys.

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 forty years, from the ocean surface to depths exceeding six thousand meters.

Learn more at www.DeepWaterBuoyancy.com

Mooring Matters: The C-Streams Project

Oct 20, 2023

Mooring Matters - C-Streams Project - October 2023 Comparison

This month’s technical highlight discusses the C-Streams Project – Studying How the Gulf Stream Affects the Climate System.

The C-Streams Project is a collaborative research project by The University of Liverpool, the University of Miami, the National Oceanography Center, the Scottish Association for Marine Science, and the British Antarctic Survey.

The project deployed a variety of scientific instrumentation into the Gulf Stream on a customized DeepWater Buoyancy StableMoor® Mooring Buoy. The C-Streams Project team will use these instruments to monitor the flow of carbon and nutrients in the Gulf Stream. Project scientists hope the results will provide insight into the Gulf Stream’s role in the ocean carbon cycle and how it affects global climate change.

The C-Streams Project

The C-Streams Project is a four-year, £4 million collaborative research project supported by the Natural Environment Research Council (NERC) and the US National Science Foundation (NSF).

Headed by Professor Ric Williams of The University of Liverpool, the C-Streams Project will observe how the current speed, turbulence, and other factors can affect carbon and nutrient circulation in the Atlantic Ocean.

Most ocean carbon exchange occurs through two mechanisms:

Phytoplankton photosynthesis, which requires nutrient-dense water
Chemical exchange between seawater and atmospheric carbon dioxide

By observing the flow of nutrients and carbon in the Gulf Stream under varying conditions, the C-Stream Project seeks a deeper understanding of these dynamic carbon exchange processes.

“We will use this data alongside the latest state-of-the-art ocean and climate models to provide us with some answers as to how the Gulf Stream affects the carbon cycle, a hitherto ignored aspect of the climate problem,” explains Professor Ric Williams.

The Deployment

Deploying sensitive instrumentation in the turbulent Gulf Stream involves significant coordination between scientists, mooring specialists, sailors, and engineers. Instruments require stability to ensure consistent readings, which means a mooring system capable of withstanding the Atlantic Ocean’s changeable and sometimes violent weather.

To launch the C-Streams Project, scientists successfully deployed two DeepWater Buoyancy StableMoor® Mooring Buoys holding a variety of scientific instrumentation into the Gulf Stream through the Florida Straits.

Thanks to the captain and crew of the Walton Smith, principal scientist Professor Lisa Beal (University of Miami), the mooring expertise of Eduardo Jardim (University of Miami), Dr. Pete Brown and Darren Rayner (National Oceanography Centre), and the project research team, the launch went smoothly.

The team also deployed three biogeochemical moorings designed by Darren Rayner. These additional moorings included buoys, sensors, and autonomous vehicles.

Over the next four years, the deployed equipment will obtain data, take measurements, and collect samples to assess how the Gulf Stream current affects nutrients and carbon transport. The C-Stream Project team will analyze this information to determine whether the Gulf Current’s interactions enhance or inhibit the ocean’s carbon dioxide uptake.

On-deck View of the StableMoor Mooring Buoy for Study of Gulf Stream

Photos courtesy of University of Miami mooring technician Eduardo Jardim.

The Buoy

It takes a special buoy to provide a stable platform for instrumentation in high-speed ocean currents like the Gulf Stream. Specifically engineered for these types of applications, DeepWater Buoyancy’s StableMoor® buoys provide excellent mooring stability in extreme flow environments.

With a tapered cylindrical design, the StableMoor® reduces drag and minimizes mooring inclination and excursions. The decreased frontal area provides superior dynamic stability in high current areas compared to traditional spherical buoys. A high-strength GRP tail and stainless-steel mooring swivel ensure optimal flexibility and stability in the Gulf Stream’s strong, changeable currents.

David Capotosto, DeepWater Buoyancy’s Director of Business Development, is excited to see how the project evolves. “It is always amazing to see how ocean scientists and engineers utilize our products,” he says. “This project showcases our team’s ability to deliver on our design philosophy: to provide our end users with a product that is fit to their application.”

Resources

About DeepWater Buoyancy, Inc. DeepWater Buoyancy, Inc., located in Maine USA, provides subsea buoyancy products for offshore energy, oceanographic, military, and technology companies around the world. Customers have relied on our products for over forty years, from the ocean surface to depths exceeding six thousand meters. Learn more at DeepWaterBuoyancy.com

Representative Spotlight – DASCO Equipment

Feb 9, 2023

DeepWater Buoyancy has the finest domestic and international representative network for subsea buoyancy. What follows is the next in a series of articles on our representative groups.

In this installment, we are highlighting our representative group from Canada – DASCO Equipment.

Introduction

Founded in 1987, DASCO is another of our representatives who have many years of experience integrating our buoyancy solutions into subsea moorings and structures. DASCO services our customers in this region such as the Bedford Institute of Oceanography and the Dalhousie University.

DASCO Equipment Inc was established in 1987 by Mr. David Stewart, and for over 30 years continues to be the leading Canadian supplier of the latest advancements in subsea instruments, integrated ocean technology solutions and technical services to Canadian government agencies, private industry, and academia. The company was taken over by Blaine Carr and Matthew Davis in 2022 to continue the company’s vision and expansion.

DASCO Equipment’s location in Halifax, Nova Scotia.

Working with DeepWater Buoyancy

DASCO has been working with DeepWater Buoyancy’s product line since 2015 and has a deep working knowledge of the products and their applications. Since that time, the companies have worked together to provide Canadian customers with the world’s finest flotation systems to deploy and recover their instrumentation.

They provide standard and customized buoys such as, Spherical and Elliptical ADCP Buoys for use with the full line of Teledyne Marine products. They also work closely with customers to develop bespoke solutions based on specific situations.

Representation

In addition to DeepWater Buoyancy, the company also represents the following equipment manufacturers:

Teledyne Marine
Trimble
Valeport
HYPACK
Terradepth
Marine Advanced Robotics
Hemisphere

DASCO has a national footprint with it’s head office located in Kensington, PEI with sales and support outlets in Dartmouth, Nova Scotia and Cultus Lake, British Columbia. DASCO also has a sales partnership with ASL Environmental located in Sidney, British Columbia.

Services Include

Sales – Representing our manufacturing partners in Canada for marine research projects
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 technical specialists 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.

Core Markets

Coastal Sciences
Offshore Oceanography
Marine Survey & Construction
Subsea Inspection & Defence
Offshore Oil & Renewable Energy
Connectivity & OEM Electronic Components

See the full line of products HERE.

To learn more about DASCO Equipment or to speak with Matthew Davis, please email sales@dascoei.ca or call +1.902.432.9285.

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 forty years, from the ocean surface to depths exceeding six thousand meters.

Learn more at DeepWaterBuoyancy.com

Oceans 2022

Oct 12, 2022

Exhibiting

DeepWater Buoyancy is exhibiting at the 2022 Oceans Conference and Exposition. The event is being held October 17-20 at the Virginia Beach Convention Center.

If attending, please be sure to come and meet Dan Cote, Sales Manager, and Matt Henry, DeepWater Buoyancy’s Operations Manager.

About Oceans 2022

OCEANS is a bi-annual event for global marine technologists, engineers, students, government officials, lawyers, and advocates. At OCEANS 2022 Hampton Roads, these industry thought leaders gather for four days to highlight relevant topics and current trends while creating a community of learners and influencers who consistently advance research, practices, and policies for the marine field.

The Marine Technology Society and the IEEE Oceanic Engineering Society partner to present OCEANS, and this prestigious conference and exhibition draws an audience of more than 2,000 attendees.

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 forty years, from the ocean surface to depths exceeding six thousand meters.

Learn more at www.DeepWaterBuoyancy.com

Teledyne Partner Products Page

Oct 3, 2022

DeepWater Buoyancy-Teledyne Marine Partner Products Page

Announcement

DeepWater Buoyancy is pleased to announce the new Teledyne Partner Products page of its website. The new page showcases the company’s products that are designed to support deployment of the Teledyne RDI ADCP product portfolio.

The products are the result of decades-long collaboration between the two companies. The page allows easy access to information about the joint deployment solutions.

The Teledyne Partner Products Page

The page is organized into three Product Categories:

Subsea ADCP Buoys,
ADCP Frames
Bottom Mounts

In each of the categories you will find:

Information & datasheets for DeepWater Buoyancy products
Links to more information
A list of compatible Teledyne RDI instruments
Product and field photos

For each of the Teledyne RDI ADCPs, there is helpful information and links to learn more.

DeepWater Buoyancy International Representatives

A Long History

Over the years DeepWater Buoyancy has worked closely with and Teledyne RDI to design and produce a full line of deployment products. In fact, the very first ADCP buoy was made by the company’s predecessor, Flotation Technologies, back in 1986.

Since then, DeepWater Buoyancy’s customized buoys and frames have been coupled with Teledyne RDI’s quality precision ADCPs to provide industry professionals with an array of solutions to collect highly accurate data for coastal and offshore applications. This partnership follows decades of joint design and development efforts to meet the needs of their mutual clients around the globe.

A Recent Collaboration

When the Teledyne RDI Product Development Team was developing the Pinnacle ADCP, DeepWater Buoyancy worked closely with them to ensure fit and functionality with existing buoys. This allowed for full compatibility with end users’ existing inventory of buoys. In addition to ensuring that the products worked, DeepWater Buoyancy developed a full conversion kit that included a custom frame (required for the unique beam pattern), a replacement buoy clamp that doubled as a lifting tool, and a unique Buoy Lifting Strap System.

Learn more about the conversion kit HERE

DeepWater Buoyancy-Teledyne Marine Pinnacle ADCP Conversion Kit

Visit the Partner Page…

https://deepwaterbuoyancy.com/teledyne-partner-products/

Also…

In addition to supporting the Teledyne RDI ADCP products, did you know that the company also produces products that are compatible with Teledyne Benthos acoustic releases? Learn more by clicking on the images below…

Teledyne Benthos Pop Up Buoy Recovery Systems

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 forty 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/

2022 MTS Buoy Workshop

Sep 11, 2022

Exhibiting

DeepWater Buoyancy is exhibiting at the 14th MTS Buoy Workshop. The event is being held September 19-22 at The University of North Carolina Wilmington’s Coastal Ocean Research and Monitoring Program (CORMP), in Wilmington, North Carolina

If attending, please be sure to come and meet Dan Cote, Sales Manager, and newest sales team member Jordan Tremblay, Sales Engineer.

Event Details from MTS

You are cordially invited to join us for the 14th MTS Buoy Workshop sponsored by the Marine Technology Society (MTS) to present and share your buoy-related work and projects to all attendees. This event is endorsed by the UN Decade for Ocean Science.

Since the 1960s, these workshops have covered the technology of oceanographic, weather, and other buoy systems. Originally based on the suggestion and support by the Office of Naval Research, buoy workshops have been organized and supported every two years since 1996 to foster communication and exchange between designers, assemblers, operators, and users of buoy systems.

This year’s Workshop will be hosted by The University of North Carolina Wilmington’s Coastal Ocean Research and Monitoring Program (CORMP), in Wilmington, North Carolina. We will open with an Ice-Breaker on Monday night, September 19. The Speaker Program begins at 8 am on Tuesday, September 20, and ends Thursday afternoon (5ish), September 22. Wednesday afternoon will be dedicated for site tours of our host facilities that are engaged in active buoy work. Following the tours, the Attendee’s Gala dinner will be held starting at 6:30 pm.

Learn more about the event Buoy Workshop (mtsociety.org)

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 forty years, from the ocean surface to depths exceeding six thousand meters.

Learn more at www.DeepWaterBuoyancy.com

Oceanology International 2022

Mar 2, 2022

Exhibiting

DeepWater Buoyancy is exhibiting at Oceanology International 2022.

The event will take place from March 15-17 at the ExCel London.

About the Event

Oceanology International brings together 500+ exhibitors in the only event that links the three key players in the industry: businesses, academics and government. Visit us in 2022 for innovative live on-water demonstrations and interactive seminars looking into the future of our industry.

With over 8,000 attendees targeted for 2022, it is a must-attend event for those involved in exploring, monitoring, developing or protecting the world’s oceans, from seabed to surface and beyond.

Join us at ExCel London to discover game-changing innovations and solutions transforming the future of ocean technology.

Learn more at the website – www.oceanologyinternational.com

At the Stand

Deepwater Buoyancy will be represented at the event by Mouna Benlemrid. Mouna is principal of DeepBlue Technology and one of our premier ocean science representatives in Europe. Please come visit us at Stand K20.

At the event, we will be highlighting our full range of products for the ocean science community, including our line of midwater ADCP buoys.

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 forty years, from the ocean surface to depths exceeding six thousand meters.

Learn more at www.DeepWaterBuoyancy.com

Representative Spotlight – DeepBlue Technology

Jan 29, 2022

Rep Spotlight DeepBlue Technology France

DeepWater Buoyancy has the finest domestic and international representative network for subsea buoyancy. What follows is the next in a series of articles on our representative groups.

In this installment, we are highlighting our French representative group – DeepBlue Technology.

Introduction

DeepBlue Technology was founded in 2018 to provide complete oceanographic measurement solutions for diverse applications such as, environmental monitoring, navigation safety, maritime works, aquaculture, and renewable marine energy.

The company was founded by Mouna Benlemrid who took advantage of her signal processing and acoustics engineering background and her knowledge of the French ocean science market to build strong relationships with oceanographic customers.

From its base in Bordeaux, France, DeepBlue Technology works to create a bridge between global equipment manufacturers and the French market, including the overseas territories. Its main customers are the major French players working in the oceans and inland waters: research institutes, universities, harbors, engineering offices, and dredging companies.

Working with DeepWater Buoyancy

Ms. Benlemrid has been working with DeepWater Buoyancy’s product line since 2015 and has a deep working knowledge of the products and their applications. As such, DeepWater Buoyancy was selected as the first manufacturer that the company chose to represent. Since that time, the companies have worked together to provide French customers with the premier global flotation systems to deploy and recover their instrumentation.

They provide standard and customized buoys such as, Spherical and Elliptical ADCP Buoys for research deployments of the National Research Institute and the National Marine Service. They are also working closely with customers to develop bespoke solutions based on specific situations.

Representation

In addition to DeepWater Buoyancy, the company also represents the following equipment manufacturers:

YSI (Xylem Analytics) with flexible instruments for water quality measurements
Aanderaa ( Xylem Analytics) with a very large and high quality panel of solutions for water’s physical properties measurements
Seaber the french developer of the highly innovative micro AUV YUCO
AML Oceanographic with the high accuracy probes
IM Solutions with the versatile French Autonomous Surface Vehicles.

Its strong technical background allows DeepBlue Technology to have a deep understanding of its customers’ challenges and opportunities, so that it might propose the most relevant solution among its suppliers and to advise on installation and maintenance.

See the full line of products HERE.

To learn more about DeepBlue Technology or to speak with Mouna Benlemrid, please contact us 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 forty years, from the ocean surface to depths exceeding six thousand meters.

Learn more at DeepWaterBuoyancy.com

DeepWater Buoyancy & Tekmar Group Sign MOU

Aug 16, 2021

Announcement

DeepWater Buoyancy, Inc., a leading producer of subsea buoyancy products for offshore oil & gas, energy, oceanographic, and technology companies, is pleased to announce it has signed a Memorandum of Understanding (MOU) with Tekmar Group (AIM: TGP), a leading provider of technology and services for the global offshore energy markets.

Under the MOU, the companies will bring together their complementary engineering capabilities, and extensive track records in their respective fields, to enhance the range of services and technologies they offer customers, whilst helping to integrate and optimize offshore project supply chains.

The partnership is focused on the new and emerging floating offshore wind market which has an exponential growth forecast of 10GW installed capacity by 2030. Tekmar Group and DeepWater Buoyancy will provide greater value across the life of a floating wind project by offering a collective package of geotechnical assessment and engineering analysis, cable and mooring system design, cable protection and stabilization solutions, cable buoyancy, and mooring line buoyancy. Additionally, they will offer bespoke product solutions for the unique elements of floating offshore wind projects, such as cable disconnection systems.

The partnership further supports Tekmar Group’s organic growth strategy by strengthening its presence and manufacturing capability in the US fixed offshore wind market, an emerging but increasingly important market for the Group. The partnership also provides DeepWater Buoyancy with greater access to the European market, where their products complement Tekmar Group’s existing offering.

Gary Howland, Group Sales Director at Tekmar Group said “Aligning with DeepWater Buoyancy gives Tekmar Group access to over 40 years of innovation in subsea buoyancy products. This strengthens the unrivalled service and technology capability we already offer across a subsea project’s timeline. The partnership supports Tekmar Group’s ambition for the global floating wind market and the US fixed offshore wind market, where we now have stateside expertise and manufacturing capability. We look forward to building a strong and rewarding relationship with DeepWater Buoyancy.”

David Capotosto, Co-President & Director of Business Development at DeepWater Buoyancy commented “This new partnership represents both companies’ commitment to serving the rapidly growing offshore wind market and will enable us to offer a wider range of products and service solutions to our customers. We look forward to leveraging Tekmar Group’s vast offshore wind experience and their extensive global reach to drive the partnership forward.”

Tekmar-and-DeepWater-Buoyancy-ink-floating-wind-MoU

David Capotosto, Director of Business Development for DeepWater Buoyancy, and Gary Howland, Group Sales Director for Tekmar Group, sign the MOU during a video teleconference.

About Tekmar Group

Tekmar Group plc, based in Darlington UK, provides market-leading technology and services to the global offshore energy markets through its primary operating companies Ryder Geotechnical Limited, AgileTek Engineering Limited, Subsea Innovation Limited, Tekmar Energy Limited, and Pipeshield International Limited.

Learn more at www.TekmarGroup.com

About DeepWater Buoyancy, Inc.

DeepWater Buoyancy, Inc., located in Maine USA, provides subsea buoyancy products for offshore energy, oceanographic, military, and technology companies around the world. Customers have relied on our products for over forty years, from the ocean surface to depths exceeding six thousand meters.

Learn more at DeepWaterBuoyancy.com

Mooring Matters: Studying Krill Populations Using Moored ADCPs

Mar 24, 2021

For the next installment in our series of technical articles, ADCP manufacturer Nortek and scientists at NOAA Southwest Fisheries Science Center bring us a case study on the use of moored ADCPs from Antarctica.

The study shows how changing conditions require changing technological solutions, in this case to monitor krill populations in the Southern Ocean.

Antarctic krill are an important resource for many marine animals and are fished by humans (Photo: NOAA AERD).

Introduction

At its largest, an individual Antarctic krill measures only 6 cm in length, not much longer than a golf tee. Despite their size, these tiny creatures are of great ecological importance in the Southern Ocean. Tens of thousands of krill swim together in large swarms that can reach several kilometers in length. These aggregations of krill are an important food source to many marine animals, including whales, seals, and penguins.

Pressures on krill populations are growing as climate change and ocean acidification intensify. In addition to these changing ocean conditions, commercial fishing of krill resources is becoming more common. Responsibly managing krill populations and fisheries is crucial to conserving the Southern Ocean ecosystem.

Monitoring Krill for Ocean Conservation

Fisheries must be aware of krill abundance and distribution as to not harvest krill from an area of particular ecological importance. Scientists at NOAA’s Southwest Fisheries Science Center in the USA are working to better understand the interactions between krill, their predators, and their environment, to ensure sustainable management of krill resources.

Krill populations have been studied by NOAA’s Antarctic Marine Living Resources (AMLR) Program within the Antarctic Ecosystem Research Division (AERD) since 1986. Historically, these researchers have relied on annual ship-based research surveys to observe krill fishing areas. Data from these surveys are used to advise the Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR) on fishery management strategies.

Conducting ship-based research is becoming a less viable option for krill management research, however, not only owing to its expensive and time-consuming nature, but because of shifting conditions leading to changing fishery operations. Decreasing levels of sea ice have extended the season of krill fishing into the autumn and winter, and in recent years fishing has been concentrated into smaller areas.

These changes in the timing and distribution of krill fishing created the need for a new monitoring system to observe krill populations.

Around half of a leopard seal’s diet is made up of fish and krill, according to National Geographic. The other half? Animals like Gentoo penguins, who also rely on krill as a food source (Photo: NOAA AERD*).

A New Approach Using Moored ADCPs and Gliders

AMLR scientists developed a plan to monitor krill populations at higher spatial and temporal resolutions than before by relying on ADCP technology. The researchers settled on a two-part deployment plan: six moorings, each equipped with a Nortek Signature100 ADCP with an integrated echosounder, and two gliders, equipped with echosounders and other sensors.

The Signature 100 ADCP with integrated echosounder has an effective range of 300-400 m, allowing the researchers to observe the entire water column.

This system allows researchers to collect data on krill movement and density at appropriate temporal and spatial resolutions. The moored ADCPs provide detailed data at their respective locations, and the moving gliders collect data over a larger geographic area. Relying on this technology allows for data collection over several months, at a much lower cost than with a ship-based research program.

NOAA Deployment of DeepWater Buoyancy ADCP Buoy

Deployment of the moorings in the Southern Ocean will occur year after year to monitor krill populations.

Mooring Design and Considerations

Each of the six initial moorings was outfitted with a Nortek Signature100 ADCP with an integrated echosounder, mounted upward-looking in a subsurface DeepWater Buoyancy elliptical buoy. Each mooring also had several CTDs, double releases and anchor weights.

The default depth for the top of each buoy was 350 m unless the deployment site was shallower; the shallowest site was 175 m deep with the buoy at 165 m. A low-frequency ADCP such as the Signature 100 allows for measurement of current speeds throughout the entire 350 m water column and operates at the correct frequency to identify krill. The integrated echosounder further simplifies the mooring design and deployment considerations.

DeepWater Buoyancy ADCP Buoy and Mooring Diagram

The moorings were designed to keep the ADCPs stable to gather accurate measurements (Slide: George Cutter, NOAA).

A DeepWater Buoyancy elliptical buoy was chosen to keep the ADCPs in a stable position. Keeping the ADCP upright and stable is crucial for gathering accurate ADCP and echosounder measurements. Selecting a buoy shape is a balance between size, draw down (how much the currents push the buoy), and drag. An elliptical buoy is smaller and reduces drag, but can be more easily moved by currents, as it acts as a “kite” in high velocity conditions. Knowing the current conditions in the area were generally less than 0.5 m/s, the researchers chose an elliptical buoy for the moorings.

Using the System to Gather Information about Krill

To estimate krill biomass using the ADCPs, the AMLR team used backscatter data as an index of krill biomass. The ADCPs were calibrated in a controlled tank before deployment to ensure the same amount of returned acoustic energy correlated with the same krill density for each mooring. The integrated echosounder on the Signature100 provides a “picture” of krill in the water column, further confirming these observations.

Using backscatter and echosounder data, the researchers painted a picture of krill in the Southern Ocean.

After a season of deployment, the team was able to collect data to truly “see” krill in the Southern Ocean. The ADCPs will be deployed again year after year, and the data will be used in CCAMLR to manage fishery tactics and conserve the Southern Ocean ecosystem.

*All images of marine mammals were taken in accordance with U.S. Marine Mammal Protection Act Permit #160472.

Nortek ADCP Deployment Solutions

Nortek instruments are even better with the best ADCP deployment products. DeepWater Buoyancy produces a full line of deployment products for Nortek subsea acoustic instruments.

See our solutions HERE

Learn More

Krill is an important food resource for both animals and humans, and krill harvesting must be done in a sustainable manner, based on accurate, scientific observations. Learn more about combining current and biomass measurements for unprecedented insight into ocean resources in this video.

About Nortek

Nortek designs, develops and produces scientific instruments that apply the Doppler principle to underwater acoustics in order to measure water in motion, such as currents and waves.

Learn more at nortekgroup.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 forty years, from the ocean surface to depths exceeding six thousand meters.

Learn more at DeepWaterBuoyancy.com

Instrumenting a Mooring Webinar

Feb 23, 2021

Teledyne marine Link - Instrumenting a Mooring

Looking to learn more about design and deployment of subsea instrument moorings? Join us for an online session to look at this from a variety of perspectives.

We have brought together a team with vast and varied experience in deploying ADCPs and other instruments. DeepWater Buoyancy and Ocean Data Technologies will join an upcoming Teledyne Marine Link webinar.

The event begins March 10 at 10:00 EST. It will include three presentations, as well as some time for Q&A.

Register here – LINK

About the Event

Instrumenting a Mooring: Technology, Tips, & Design Considerations

There are a lot of things to be considered when designing, deploying and recovering subsea instruments. In this webinar we bring together perspectives from three companies that are leaders in subsea moorings for ocean science. Collectively they will present concepts related to the instruments, the buoys, frames and bottom mounts, and the process of successfully deploying and recovering these packages.

Paul Devine from Teledyne Marine will discuss Mooring Types and Tips for ADCPs.
Dan Cote of DeepWater Buoyancy will present information on Subsea Buoys and Bottom Mounts.
Jon Wood of Ocean Data Technologies will share Mooring Wisdom: Design, Deployment, and Recovery of Subsea Moorings.

About the Presenters

Paul Devine, Regional Sales Manager – Teledyne Marine

Paul Devine was trained as a coastal engineer and successfully deployed (and retrieved) a number of ADCPs for sediment transport studies. After joining RD Instruments in 1999, Paul has been helping customers to collect reliable oceanographic information from both shallow and deep water moorings. Paul gets very excited by low frequency swells, western boundary currents and stable moorings that produce high quality ADCP data.

Dan Cote, Sales Manager – DeepWater Buoyancy, Inc.

Dan Cote has over 25 years of experience in all aspects of subsea product design, manufacturing, and sales, and is well-known in the industry. He leads the DeepWater Buoyancy sales and sales engineering team.

Jon Wood, President – Ocean Data Technologies, Inc.

Jon D. Wood is a Senior Ocean Engineer and President/Founder of Ocean Data Technologies, Inc. He has more than 35 years of experience observing and analyzing physical oceanographic processes, specifically ocean currents, tides, and waves. He has designed and installed hundreds of oceanographic moorings throughout the world – from estuary stream flows knee-deep in mud to deep-sea benthic moorings at 4500 meters depth. From the Gulf of Maine to West Africa to Indonesia to Australia. Not at all immune to seasickness, he made perhaps the worst career choice possible.

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 forty years, from the ocean surface to depths exceeding six thousand meters.

Learn more at DeepWaterBuoyancy.com

2020 Oceans Conference and Exhibition

Sep 28, 2020

Sponsors and Exhibitors

DeepWater Buoyancy is co-sponsoring and exhibiting at the 2020 Oceans Conference and Exhibition

Due to travel restrictions, this year’s event will be entirely virtual.

The event is from October 5-14.

About the Event

Global thought leaders and innovators in the areas of marine technology, engineering, science, research, and education will gather together to learn and experience cutting-edge technologies in the field of marine science, hear from industry experts and engineers regarding the latest research and innovations, discuss current environmental issues and policies affecting the field, and collaboratively work together to move the fields of marine technology and engineering forward.

Join the thousands of professionals who have made OCEANS their home for continued learning:

Businesses, institutions, individual professionals and students who are ocean engineers, technologists, policy makers and educators
Members of academia, government and industry who want a common forum for the exchange of information and ideas
Professionals interested in all aspects of science, engineering, and technology that address research, development, and operations pertaining to all bodies of water; this includes the creation of new capabilities and technologies from concept design through prototypes, testing, and operational systems to sense, explore, understand, develop, use, and responsibly manage natural resources
Individuals interested in sessions that are scientific, literary, and educational in character that strive for the advancement of the theory and practice of electrotechnology, allied branches of engineering, and related arts and sciences, applied to all bodies of water; and the maintenance of high professional and ethical standards among its members and affiliates.

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 forty years, from the ocean surface to depths exceeding six thousand meters.

Learn more at www.DeepWaterBuoyancy.com

2020 Blue Innovation Symposium

Jan 3, 2020

Sponsoring

DeepWater Buoyancy is co-sponsoring and exhibiting at the 2020 Blue Innovation Symposium.

The event will take place on January 14-16, 2020.

This year’s event will be held at Salve Regina University in Newport, Rhode Island.

About the Event

The Blue Innovation Symposium is the premier event in New England for connecting the marine technology industry for education, networking and facilitating partnering opportunities. Held in Newport, Rhode Island, this conference brings together a broad spectrum of representatives of the marine technology industry from the US and beyond.

Last year’s conference brought together more than 250 attendees, 36 corporate sponsors, and key community members including representatives from the US Navy, the US Naval Undersea Warfare Center (NUWC), the Association for Unmanned Vehicle Systems International (AUVSI), the University of Rhode Island, the University of Massachusetts at Dartmouth, the Mississippi Enterprise for Technology (MSET), and many more.

The symposium intends to bring together leading-edge marine technology companies for programming aimed at providing an overview of current trends in the industry, and a showcase of companies to discuss their new technologies.

The Blue Innovation Symposium is organized by Salve Regina’s Office of Graduate Studies and Continuing Education as part of our effort to connect the University with industry, organizations, state and federal agencies, and other key stakeholders in order to grow the region’s economy.

Visit the website at… blueinnovationsymposium.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 forty years, from the ocean surface to depths exceeding six thousand meters.

Learn more at www.DeepWaterBuoyancy.com

2019 Houston Chapter MTS BBQ

Nov 1, 2019

Sponsoring

DeepWater Buoyancy is co-sponsoring and exhibiting at the Annual MTS Houston BBQ.

The event will take place on Thursday, November 7th.

This year’s event will be hosted by Ashtead Technology Offshore, Inc

About the Event

The Houston Section of the Marine Technology Society, the largest Section of the Society, will host its Annual Barbecue Social and Fundraiser on November 7, 2019. This annual event has become a much-anticipated tradition along the Gulf Coast, attracting around 600 to 800 offshore industry professionals and their guests. The Barbecue is open to anyone wishing to attend.

Hosted By

Ashtead Technology Offshore, Inc.
14825 Northwest Freeway, #900
Houston, TX 77040
Phone:( 281) 398-9533
https://www.ashtead-technology.com/

Program
3:00 PM – Exhibitor Set up – arrive no later than 4:00 PM
4:00 PM – Registration & Food service for Exhibitors
5:00 PM – General Registration begins
6:30 PM – Food Service begins for attendees
7:15 PM – Announcements
7:30 PM – Silent Auction ends
8:30 PM – Evening Concludes

Networking Opportunities
This relaxed and casual environment is your opportunity to connect and mingle with a variety of industry members.

Exhibitors
Some 80 exhibit tables are available to companies associated with the offshore industry where you can to display your technology and products to prospective customers. This year there will be 5 Test Tank Exhibitors to demo your equipment in the test tank. A Silent Auction will include a wide variety of donated items along with autographed sports memorabilia provided by Diamonds in the Rough.

Fundraising
As the Section’s leading fundraiser of the year, the money raised supports the Section’s vibrant scholarship program. Each year, the Houston Section donates around $160,000 in scholarships and student support. Close to 100 students attend from local universities and a scholarship award program will take place the evening of the Barbecue. There is even a section of the Barbecue allocated to local high school robotics clubs where their robotics are on display.

Have Questions? Interested in Sponsorship or Exhibit Opportunities, contact Melissa Wood, melissawood@tdi-bi.com, 713-208-1734.

Learn more and register HERE

About MTS

The Marine Technology Society was incorporated in June 1963 to give members of academia, government and industry a common forum for the exchange of information and ideas. The guiding purpose is:

“To promote awareness, understanding, advancement and application of marine technology.”

Today, MTS is a growing organization, boasting a membership of businesses, institutions, individual professionals and students who are ocean engineers, technologists, policy makers and educators.

MTS Mission

Facilitate a broader understanding of the relevance of marine technology to wider global issues by enhancing the dissemination of marine technology information
Promote and improve marine technology and related educational programs
Advance the development of the tools and procedures required to explore, study and further the responsible and sustainable use of the oceans.

MTS’s long-range vision is to be:

“The leading authority and advocate for marine technology and resources while promoting member success and public understanding.”

MTS Website

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 forty years, from the ocean surface to depths exceeding six thousand meters.

Learn more at www.DeepWaterBuoyancy.com

Buoy Conversion Kit for Teledyne RDI Pinnacle ADCP

Oct 10, 2019

Announcement

In a joint product release with Teledyne RDI, DeepWater Buoyancy announced a new product – the Buoy Conversion Kit for Teledyne RDI Pinnacle ADCP.

This kit allows the use of Teledyne RDI’s new Pinnacle ADCP on existing DeepWater Buoyancy ADCP buoys.

Designed in collaboration with Teledyne Marine’s Product Development Team, the kit includes an ADCP clamp, top frame, and lift strap system.

About the ADCP Buoy Conversion Kit

DeepWater Buoyancy collaborated with the Teledyne RDI product development team throughout the design of the Pinnacle ADCP. Features were incorporated into the Pinnacle housing to allow for secure mounting of the instrument in DeepWater Buoyancy ADCP buoys. Darryl Symonds, Director of Marine Measurements Product Lines for Teledyne RD Instruments said, “We have been working with the DeepWater Buoyancy team (formerly Flotation Technologies) for decades. This latest collaboration on the Pinnacle product is just the most recent in a long history of successful co-design that started with the very first subsea spherical ADCP buoy in 1986.”

The kit consists of three assemblies: the clamp, the frame and the buoy lifting straps.

The Clamp

The clamp is similar to the standard ADCP clamp in that it is made of urethane and fastened with titanium hardware for superior corrosion resistance. It is unique, however, in that it has a “keying” feature that ensures that the Pinnacle is “clocked” correctly. Unlike a standard ADCP, the Pinnacle has no obvious “lobes” to ensure that the beams pass between the top frame legs. Instead, it has a flat face. So the joint engineering team placed a key on the Pinnacle housing to match a feature on the clamp to ensure beam location.

In addition to this key, there is a slot in the Pinnacle housing that matches a rim in the clamp. This ensures that there is no axial movement of the instrument during handling and deployment.

The clamp has composite loops that allow a fiber lifting strap to be passed through. These straps allow for safer and easier handling and mounting of the ADCP into the buoy.

The Top Frame

The conversion kit frame is noticeably longer than a standard ADCP frame. This is to provide the appropriate space above the transducer face for the acoustic beams to develop. Additionally, the frame has a feature to allow the connection of the Buoy Lifting Strap for safe handling.

Like all DeepWater Buoyancy ADCP frames, it is manufactured with 316L stainless steel. It is then electropolished and fitted with replaceable zinc anodes for superior corrosion resistance. The frame arbor is fitted with isolation bushings and allow connection to the mooring line with standard shackles.

The Buoy Lift Strap System

Also included in the conversion kit is a Buoy Lift Strap System. Designed with Ocean Engineer Jon Wood of Ocean Data Technologies, the strap system allows for safe deployment and retrieval of the buoy. The strap allows the buoy to be lifted without placing unnecessary stress on the extended frame members and for the buoy to be lifted with its axis horizontal. In addition to the safeguarding of frame and instrument, the horizontal lift allows for a shorter lift height to minimize the A-frame and hoist specifications necessary for deployment and recovery. Jon Wood also points out, “In addition to being a tool for deployment and recovery, the strap system appears to act as a vane and reduces spinning motion of the buoy.”

About the Pinnacle

Once again, Teledyne RD Instruments takes its rightful place as the leader in deep-water current profiling technology. Building upon the tremendous 20-year success of their industry-standard Long Ranger ADCP, Teledyne RDI is pleased to introduce their next-generation long-range ADCP—the Pinnacle 45.

Rated to a depth of 2000 m, the 45 kHz phased array Pinnacle ADCP delivers a 1000 m current profiling range with a decreased size and weight, a game-changing field-swappable configuration, and a long list of impressive new features and product enhancements, including:

Swappable Configuration: Convert from Self-Contained to Real-Time without an additional purchase
Adaptable: Independent or Interlaced long range and high resolution modes allow users to optimize their system for unique deployment requirements, offering the best of both worlds in a single instrument.
Continuous Sampling: Pinnacle’s 4 beams ping simultaneously (as opposed to individually), allowing for simultaneous sampling of a full profile.
Easy Data Access: Redundant MicroSD memory cards for added data security.
Compass Enhancements: Pinnacle includes both heading field calibration and magnetometer data, allowing you to utilize either or both and to turn your mooring faster.
Deployment Status Indicator: External LED light ensures you know the system is operational when deployed.
Advanced Monitoring: Health Monitoring and leak detection provide users with the peace of mind that their system is operating as intended.
Increased Data: 20° phased-array beam allows you to measure within 6% of range to surface (air/sea or bottom), closing the gap on missed data.
Rugged and Robust: Independent main electronics housing and battery compartment and a no metal in contact with the water designed housing and transducer limit the risk of damage from leaks.
Long Life: Alkaline or lithium battery compatible, with 18-month deployment durations possible on 4 Li batteries.

Learn how you can reach your Pinnacle at: www.teledynemarine.com/Pinnacle

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/

2019 Oceans Conference and Exhibition

Oct 1, 2019

Sponsors and Exhibitors

DeepWater Buoyancy is co-sponsoring and exhibiting at the Oceans Conference and Exhibition.

The event is being held in Seattle, Washington on October 27-31.

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

About the Event

Join the leading innovators, analysts, and producers of marine technology, research, and education gathering for the OCEANS’19-Seattle conference. Come meet your fellow professionals and students, hear from experts about their latest activities and ideas, and discuss your needs with the best suppliers of marine and maritime products in the exhibit hall. Thousands of professionals make the OCEANS conference their home for continued learning and so can you.

You can expect to meet with:

Members of industry, academia, and government who want a common forum for the exchange of information and ideas
Professionals involved in science and engineering that addresses research, development, and operations in all bodies of water
Students interested in scientific and educational advancement in the theories and practice of electrotechnology and mechatronics
Businesses and institutions interested in maintaining high professional and ethical standards among members and affiliates
Policy makers and administrators who want to know what is available to address monitoring, warning, and remediation issues

Conference theme: Blue Sea, Blue Sky, Blue Tech

Learn about new opportunities in the blue economy
Experience local and sustainable practices throughout, including use of compostable products, reduced plastics, recycling and other “blue efforts”
Learn about Washington State’s new Blue Economy maritime business plans and progress

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

2019 Teledyne Marine Technology Workshop

Sep 19, 2019

Sponsors and Exhibitors

DeepWater Buoyancy is co-sponsoring and exhibiting at annual Teledyne Marine Technology Workshop .

The event is being held in San Diego California on October 6-9.

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

Join Teledyne Marine for their newly expanded users’ workshop in which speakers, influencers, and attendees from around the globe will converge to explore, learn and share their experiences on a broad range of products, applications and technology.

Give us a few days of your time, and we’ll give you access to all twenty-three Teledyne Marine brands. We understand that your time and travel are valuable. That’s why we’re offering you intensive one-on-one access to 23 leading industry brands ready to share their technology and answer your questions. Our OneTeam is ready to assist!

Four concurrent industry speaker tracks spanning Offshore Energy, Defense, Security, Oceanographic, Hydrographic, Hydrologic, Aquaculture and Civil Engineering. Learn from your peers and industry experts as they present their field applications using Teledyne products and technology to solve some of their most complex challenges.

Product and software training

Soar up the learning curve with three full afternoons of product and software training provided by our in-house experts, long-time users, and third party solution providers. Whether you’re a new user or seasoned professional, you’re guaranteed to take away new information to optimize your operations.

Dockside and on-water demonstrations

See our technology in action! Gain invaluable hands-on experience with some of the newest technologies out there. We’ll be hosting on-water and dockside demonstrations, combined with technical presentations and Q&A sessions to ensure your full understanding of our products and technology.

One-on-one meetings with Teledyne Marine team members

Get your questions answered via one-on-one meetings with our vast array of Teledyne Marine team members. From general managers, to engineers, to sales, to technical service—we’ll have someone on site to assist you with any questions or concerns via a private meeting.

A Hydrometry Workshop for our hydrologic customers

Teledyne Marine doesn’t end at the coast. We have a full line of solutions for our hydrology professionals, with a track dedicated to your needs.

A great new venue you’re sure to love

This year’s event will be hosted at Paradise Point Resort and Spa. There’s so much to love about this venue with its relaxed vibe, beautiful guest rooms, tropical flair, and enhanced meeting and demo space.

A full day dedicated to network in a relaxed environment

Paradise Point is the perfect place for us to host our pre-conference networking day. We’re offering all of our guests and their families free access to this beautiful resort’s water sport equipment, yoga classes, and pedal bikes for a fun and relaxing Sunday with our team and your industry peers.

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

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

Mooring Matters: Uncertainty in Buoy Drag Coefficients

Jun 26, 2019

For the next installment in our series of technical articles, Ryan Nicoll of Dynamic Systems Analysis, Ltd. (DSA) looks at controlling uncertainty in buoy drag coefficient when designing oceanographic moorings.

Ryan is the Chief Technical Officer of DSA and has vast experience in both software development and use of software in oceanographic mooring design.

How to Control Uncertainty in Buoy Drag Coefficient when Designing Oceanographic Moorings.

By Ryan Nicoll, PEng – CTO of DSA, Ltd.

Introduction

It was the summer of 1991 and I stood in front of the first hedge maze I’d ever seen before. What could be more fun to a young boy that getting lost in a hedge maze and finding your way out?

I had a simple plan: get totally lost as quickly as possible by making random choices. Then I’d take my time to find my way out. So, I ran straight in at full speed, turning left or right at each turn without thinking about it.

Ryan’s first strategy for solving hedge maze: run fast, think later!

The plan completely backfired. By a complete fluke, within a minute or two, I made it to the exit of the maze. I couldn’t believe that I got straight to the end of the maze by making random decisions.

Making random decisions may work once in a while in solving a hedge maze. But you can’t make a random decision for a drag coefficient for an oceanographic buoy. These buoys can be substantial structures. Because they’re substantial, the drag forces on them can also be substantial. If they have even remotely complex shapes, it’s difficult to really know what the drag coefficient is.

We’re going to look at three ways to evaluate oceanographic buoy drag coefficients. These ways increase in complexity but still give you something to start with. These three ways to determine the drag coefficient are using:

Lookup tables
Computational Fluid Dynamics (CFD)
Field deployment data

First, we’re going to cover the use of lookup tables.

Lookup tables are a fantastic starting point

They provide drag coefficients for quite specific shapes and geometries. Helpfully, there are often tables with parameters that help you zero in on your particular shape. For example, a lookup table for a squat cylinder shows a few different values of drag coefficient based on the length to diameter ratio. Lookup tables are easy to use. You find the shape that is closest to what you’re working with, and then that’s the drag coefficient that you use in your calculations.

Cylinder drag coefficient lookup table from Applied Fluid Dynamics Handbook by Blevins

Where do these lookup tables come from?

These lookup tables are the results of decades of research and experiments. These experiments measured the total drag force on these shapes in different flow conditions. The resulting drag coefficient is computed from the data and then published in the lookup tables for future reference.

But there are also quite a few limitations

It’s rare to get an exact match to the shape you want. Even with basic shapes like cylinders, your particular form may be out of range of the lookup table. Or you may have only a few examples to work with from the lookup tables you have on hand.

So, while lookup tables give you a starting point, it still leaves some uncertainty. This takes us to the next approach that can be used to resolve the drag coefficient: computational fluid dynamics (CFD).

You can work directly with your specific buoy geometry

Previously, we learned that lookup tables were produced by decades of painstaking research and experiments that measured the total drag force on actual structures. CFD software calculates the dynamics of fluids flowing past structures. Essentially, you can use CFD to run your own virtual experiment on your specific structure directly on your computer.

Pre-processing StableMoor® geometry in Altair HyperMesh in preparation for CFD analysis in Altair AcuSolve

Almost any kind of geometry can be used in a CFD tool. Software tools like Altair HyperMesh make it easy to work with 3D models generated from CAD software. This software prepares the geometry for use in a CFD program like Altair AcuSolve. Regardless of the CFD program used, once the geometry is in place, you can set the water flow conditions you want to check. Then, when you run the program, it calculates the corresponding drag coefficient for that geometry in those conditions. This is a significant improvement from lookup tables because you can use much more precise geometry. You aren’t left trying to guess which shape best fits your specific oceanographic buoy.

But there’s a different kind of uncertainty when working with CFD

As incredible as CFD tools are, the dynamics of fluid flows can be incredibly complex. There are also many inputs and settings for the CFD flow physics models. In some particular circumstances, some of these settings can make substantial changes in the output of the drag coefficient calculations. So how do we deal with this new kind of uncertainty? This brings us to the next and final section, validation with field deployment data.

Nothing is more real than reality

If you put an oceanographic buoy in a known water current and you can measure the total drag force, well, you’ve got the actual drag coefficient! Of course, it makes sense that this would eliminate those niggling uncertainties that remain with the previous two methods. We are indeed working with the exact shape, unlike the lookup tables. And we are working with real water flows, unlike an approximation of the water flow as calculated by CFD.

This creates a bit of a chicken and egg problem

We do need to know in advance what the drag coefficient is before we design and deploy the mooring. Otherwise, the mooring is at risk if it deflects far too much, or if it breaks. However, these risks can be controlled with a staged approach using a smaller mooring in lower flow speeds, or even scale model tests in a flow tank. These scale model tests are the kinds of tests done over decades of research to make lookup tables.

What about the cost of a field deployment?

Of course, making a field deployment is incredibly complex and expensive. You need a ship and crew to deploy the equipment. The equipment itself is costly as well. It can be a complicated job to just measure the flow at a site, never mind also some characteristic of the mooring response. But that only shows how unique and valuable the knowledge of the specific drag coefficient is for that particular structure. And that drag coefficient can be used again for new mooring designs and for different locations with different flow speeds in the future.

StableMoor deployment for turbulence measurement by APL

Let’s look at a specific example

DeepWater Buoyancy’s StableMoor® Buoy is a streamlined float designed to work in high flow conditions. It’s a fairly specific shape. When reviewing lookup tables, there are a few examples that are pretty close, but not exact. Is it more like a rounded rectangle, or cylinder? How can the tail ring be accounted for? There’s only so much we can answer using this approach. The rounded block has a range of 0.25 and 0.55, so we could try 0.55. It may seem a bit random, but that’s the best we can do at this stage. The next stage is using a CFD software tool.

Lookup table drag coefficient values for rounded block from the Applied Fluid Dynamics Handbook by Blevins

We used the CFD program Altair AcuSolve to compute the drag forces on the actual geometry of a StableMoor Buoy in a few flow speed conditions. Based on the projected area from the main hull, the CFD calculated drag coefficient is 1.0. This is higher than the rounded block lookup table values because the tail ring adds extra drag to the system. At this stage we have a good idea of the buoy drag coefficient to use. To improve on this, the final stage is a validation using field data.

Altair AcuSolve CFD calculations show the flow structure surrounding the StableMoor® Buoy

Oceanographers at the UW Applied Physics Laboratory deployed a short mooring with a StableMoor Buoy® in a high flow tidal channel. The onboard sensors measured the flow velocity as well as the altitude of the StableMoor® Buoy off the seabed. As the total drag forces on the mooring and StableMoor® Buoy deflect the system, the altitude of the StableMoor® Buoy decreases. This reduction in altitude is often called knockdown.

APL mooring schematic with StableMoor® Buoy.

We reconstructed the mooring in ProteusDS to compare the results to the measured the knockdown. Using a drag coefficient of 1.0 for the StableMoor® Buoy showed knockdown within the measured range of values from the field deployment: at about 2m/s flow speed, the system shows about a 1m knockdown. So this looks like the CFD software tool did a pretty good job. This builds confidence to use the drag coefficient and the CFD analysis process again for other mooring designs.

We covered a lot of ground in our search for ways to find a drag coefficient

Now it’s time for a quick review. A starting point to resolve a drag coefficient is to use lookup tables. These represent decades of work from real experiments on various shapes. But often there’s not an exact fit to the oceanographic buoy geometry you’re working with.

The next step is to try using a CFD software tool. These software tools can use the specific buoy geometry you’re working with and provide you with the drag coefficient. While these software tools are powerful, they are still an approximation to potentially very complex fluid physics.

Indeed, there’s no replacement for reality, and so the final step would be some kind of real measurement of the buoy in actual flow conditions. While this can be a massive effort, it does provide a valuable validation of the drag coefficient for a particular buoy that can be used again in similar conditions.

Working with drag coefficients may make you feel like you are running around in a maze

You can’t just pick a drag coefficient randomly, rush on to the next step in the mooring design process, and expect success. You may be doing this if you have only a limited lookup table to work with.

Next step

Request a demo license for ProteusDS and explore how the knockdown of your specific mooring configuration can change with different drag coefficients. Use the parts library to get a good starting point in evaluating oceanographic mooring knockdown quickly.

Thanks to APL and DeepWater Buoyancy

Thanks to Jim Thomson and Alex de Klerk from APL and David Capotosto and Dan Cote from DeepWater Buoyancy for sharing technical pointers and information on the mooring deployment and StableMoor® Buoy.

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 Dynamic Systems Analysis Ltd.

Dynamic Systems Analysis Ltd. is an ocean engineering consultancy and software company based in Canada. DSA provides progressive and accessible dynamic analysis expertise and software to enable those working with vessels, structures, lines and technologies in harsh marine environments to reduce risk. DSA provides software and services to the aquaculture & fisheries, defence, marine renewable energy, naval architecture, ocean technology, and offshore sectors.

Learn more at www.dsa-ltd.ca

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

Feb 28, 2019

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

Ridderinkhof et al. (NIOZ), 2010. LINK
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/

NEW Pop-Up Buoy for Sonardyne LRT

Feb 14, 2019

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

/category/adcp-deployment-products Archive

Exhibiting

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About the Event

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Purpose-Built for Stability and Versatility

Key Features

A and B

New Brace for Collapsible Bottom Mount

Need a custom solution?

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Why We Attend

Project Summary

Mooring Equipment Challenges in the Bay of Fundy

Weathering the Bay of Fundy with Custom StableMoor® Buoys

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What the Ocean Tracking Network Does

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The C-Streams Project

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Visit the Partner Page…

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Monitoring Krill for Ocean Conservation

A New Approach Using Moored ADCPs and Gliders

Mooring Design and Considerations

Using the System to Gather Information about Krill

Nortek ADCP Deployment Solutions

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Register here – LINK

About the Event

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Paul Devine, Regional Sales Manager – Teledyne Marine

Dan Cote, Sales Manager – DeepWater Buoyancy, Inc.

Jon Wood, President – Ocean Data Technologies, Inc.

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Sponsors and Exhibitors

About the Event

Introduction

Lookup tables are a fantastic starting point

Where do these lookup tables come from?

But there are also quite a few limitations