TRAWLER-RESISTANT BOTTOM MOUNT
The GL SteelFab Trawler-Resistant Bottom Mount (TRBM) is profiled to minimize exposed hook points where the trawler gear can catch. Rather than completely resisting the trawler gear scraping effect, this TRBM complies with the applied forces by simply tilting against the sea floor and popping back into position once the trawler gear has passed.
The TRBM-VR2 was specifically designed for the Innovasea VR2AR and VR2AR-X receivers. The 2 holes on the receiver bracket are used to secure it to the TRBM. Simply pass a 3/8" rope through the lug and slide it down the tube to secure to the anchor. Only a few inches is required between the TRBM and the anchor resulting in a short exposed profile with minimal hook points. The receiver head remains vertical and unimpeded to acoustic signals.
SPECIFICATIONS FOR TRBM-VR2AR:
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Total displacement: 1 ft³
Weight in air: 36 lb ±2 [16.3 kg ±0.2]
Buoyancy Force: 28 lb ±2 [12.7 kg ±1]
Rated pressure: 500 psi (1000 ft/ 300 m) [34 bars]
Metal parts: Stainless steel 316
Exterior finish: 1 coat of epoxy w/ yellow pigment
1 coat of yellow paint
1 coat of pure epoxy
Total height: 39” [99 cm]
Outer diameter : 9” [23 cm]
​The TRBM-VR4 was specifically designed for the Innovasea VR4-UWM (underwater modem) acoustic receiver and the EdgeTech PORT-MFE acoustic release. The release and the VR4 are connected together with a short stainless steel rod (see picture) before sliding both items from the top of the float. The equipment is then locked in position from the top using the longer rod. A rope is passed through the lug and is secured to the anchor. Only a few inches is required between the TRBM and the anchor resulting in a short exposed profile with minimal hook points.
SPECIFICATIONS FOR TRBM-VR4:
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Total displacement: 1.37 ft³ [38.8 litres]
Weight in air: 51.6 lb ±2 [23.4 kg ±0.2]
Buoyancy Force:
No Equipment 36.1 lb ±2 [16.4 kg ±1]
w/VR4 and release 20.8 lb ±2 [9.4 kg ±1]
Rated press./depth: 500 psi (1000 ft/ 300 m) [34 bars]
Metal parts: Stainless steel 316
Exterior finish: 1 coat of epoxy w/ yellow pigment
1 coat of yellow paint
1 coat of pure epoxy
Total height: 45-5/8” [116 cm]
Outer diameter : 12” [31 cm]
