For the next installment in our series of technical articles, ADCP manufacturer Nortek and scientists at NOAA bring us a case study on the use of moored ADCPs from Antarctica.
Trawl-Resistant Bottom Mounts
These rugged deployment products are designed to protect instrumentation in areas where trawling is a concern. The AL-200 and AL-500 Trawl-Resistant Bottom Mounts (TRBMs) consist of a buoyant recovery pod designed to permit retrieval of all mounted instruments. The recovery pod is ejected from the base by a user-supplied acoustic release and trails a Spectra recovery line that is attached to the base. The aluminum base can then be winched aboard. Disposable concrete bases can also be provided depending on bottom conditions.
Conditional upon the specific requirements, acoustic recoverable systems are offered for deployment depths of up to 1000 meters. All models feature a special grade of high impact DeepTec® syntactic foam and 5000 series aluminum construction. Adjustable amounts of lead ballast in the base allow the in-water weight of the TRBM to be tailored to specific bottom conditions.
TRBM AL200 Acoustically-transparent Cover Detail
TRBM AL200 Detail
TRBM AL200 Gimbal Detail
TRBM Deployment with Acoustic Release
DeepWater Buoyancy TRBM Deployment - Ship-side View with Acoustic Release
Preparation for TRBM Deployment
TRBM with Dual ORE Acoustic Release
TRBM with Benthos Remote Head Release
DeepWater Buoyancy TRBM AL200 Deployment - Metocean Services International
AL200 TRBM with Dual Small Acoustic Release
AL500 TRBM on Deck - Woods Hole Oceanographic InstituteRelated Media
Instrumenting a Mooring Webinar
Looking to learn more about subsea mooring of instruments? Join the upcoming Teledyne Marine Link webinar.
2020 Oceans Conference and Exhibition
DeepWater Buoyancy is co-sponsoring and exhibiting at the 2020 Oceans Conference and Exhibition virtual event.
Related Products
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ADCP Inline Mooring Frames
Our in-house engineering and metal fabrication capabilities can identify a standard frame for your application or customize one to suit your needs. Working in stainless steel, aluminum or titanium, we can get your frames in line.
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Elliptical ADCP Buoys
These buoys are have the same rugged design as the spherical ADCP buoys, but have an elliptical shape for higher current applications. Available with depth ratings from 200m to 6000m.
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Hydro-float® Mooring Buoys
DeepWater Buoyancy’s subsurface mooring buoys are more versatile and reliable than conventional hollow glass or metal floats. The buoys may be cast with through holes and instrumentation pockets on any axis without compromising their strength because of their solid construction. Clamps and mounting hardware can be added for any user-supplied instrumentation.
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Pop-Up Buoy Recovery System
DeepWater Buoyancy’s Pop-Up Buoy Recovery System (PUB) allows for direct retrieval of seabed packages, such as anchors, anchor lines, and bottom-mounted frames and instruments.
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StableMoor® Mooring Buoys
For a more extreme current application, turn to the StableMoor® line of buoys. These unique ADCP buoys are customized for your particular application. Accounting for depth, instrument types and current, this design will give you stable data in unstable waters.
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Spherical ADCP Buoys
Manufactured from high-performance DeepTec® syntactic foam and fitted with 316L stainless steel and titanium hardware, spherical ADCP Buoys are designed to outperform and outlast conventional mooring flotation. Available with depth ratings from 200m to 6000m, they require minimal maintenance and are extremely durable under the most rigorous deepwater conditions.
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UpdatedInstrument Bottom Mounts
Whether your bottom mount requirement is for a mid-frequency or high-frequency ADCP, we can accommodate you. These diver-serviceable units can be produced to accept your ADCP, battery, CTD, acoustic modem or other instrument. The popular BTM-AL50 is now offered in both welded and collapsible versions.
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