This Product Spotlight focuses on DeepWater Buoyancy’s shallow water Instrument Bottom Mounts.
Instrument Bottom Mounts
DeepWater Buoyancy’s BTM-AL50 bottom mounts are 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.
These rugged diver-serviceable tripods come ready to accept your ADCP and battery canister, and can be modified to fit CTD, wave / tide gauge, velocimeter or other instrumentation.
BTM-AL50’s are manufactured using 5000 series aluminum, galvanically-isolated fasteners, and are fitted with zinc anodes for superior corrosion resistance. The double axis gimbal keeps your ADCP oriented to vertical after deployment and is manufactured using ultra-high molecular weight polyethylene to deter marine growth.
The units' three foot pads are supplied with through holes for ballast or for spiking, depending on your application. Standard (10lb/4.5kg) urethane-coated ballasts are provided for each of the three legs. Additional ballast is available upon request.
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. A brace kit is also available for additional stability with increased payloads.
Contact Us
To get assistance in choosing or configuring the correct product, to obtain a quote, or to place an order, please contact us.
BTM-AL50-A Welded Bottom Mount - Side View
BTM-AL50-A Welded Bottom Mount
BTM-AL50-A Welded Bottom Mount - ADCP Battery Clamp View
BTM-AL50-B Collapsible ADCP Bottom Mount - Open
BTM-AL50-B Collapsible ADCP Bottom Mount - Closed
BTM-AL50-B Collapsible Bottom Mount with Teledyne SentinelV ADCP and DeepWater Buoyancy Pop-Up Recovery Buoy System
DeepWater Buoyancy Pop-Up Recovery Buoy System mounted on leg of BTM-AL50-B Collapsible Bottom Mount 
DeepWater Buoyancy Pop-Up Recovery Buoy System mounted on leg of BTM-AL50-B Collapsible Bottom Mount 
BTM-AL50-A ADCP Bottom Mount - Gimbal Detail
BTM-AL50-B Collapsible Bottom Mount with Teledyne SentinelV ADCP mounted in the 2-axis gimbal.
BTM-AL50-A ADCP Bottom Mounts with Ballast
BTM-AL50-A ADCP Bottom Mounts
BTM-AL50-A ADCP Bottom Mounts in Crate for Shipment
Custom BTM-AL50-B Collapsible Bottom Mount ClosedRelated Media
Exhibiting at IPF 2025
DeepWater Buoyancy is exhibiting at Oceantic Network’s International Partnering Forum on April 28-May 1, 2025 in Virginia Beach, VA.
Ocean Business 2025
DeepWater Buoyancy will be exhibiting at Ocean Business 2025 at the National Oceanographic Centre in Southampton UK.
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