/2019 Archive

NEW Pop-Up Buoy for Sonardyne LRT

NEW Pop-Up Buoy for Sonardyne LRT


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

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

Pop-Up Buoy Product Details

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

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

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

To learn more about the PUB – CLICK HERE

Acoustic Release Product Details

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

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

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

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

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

To learn more about the LRT – CLICK HERE

About DeepWater Buoyancy, Inc.

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

Learn more at www.DeepWaterBuoyancy.com

About Sonardyne

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

Learn more at www.sonardyne.com

DeepWater Buoyancy Receives OSHA’s SHARP Award

DeepWater Buoyancy Receives OSHA’s SHARP Award

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

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

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

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

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


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

To participate in SHARP, a company must:

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

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

Learn more HERE

About ISO9001:2015

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

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

Learn more HERE

About DeepWater Buoyancy, Inc.

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

Learn more at www.DeepWaterBuoyancy.com

Product Spotlight – ADCP Buoy Frames

Product Spotlight – ADCP Buoy Frames

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

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

For more information, click HERE.

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

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

ADCPs with various transducer configurations.

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

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

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

Ring Frame for ADCP with center vertical beam.


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

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


About DeepWater Buoyancy, Inc.

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

Learn more at www.DeepWaterBuoyancy.com

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