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A delayed surface marker buoy (DSMB), decompression buoy, or deco buoy is an inflatable buoy which can be deployed while the diver is submerged and generally only towards the end of the dive. The buoy marks the diver's position underwater so the dive boat crew can locate the diver even though the diver may have drifted some distance from the ...
Diver down flag being flown on a dive ship. The use of the red and white flag, which was created in the early 1950s by Navy veteran Denzel James "Doc" Dockery of Michigan, and popularized by Ted Nixon of US Divers, [4] is required by law or regulation in many US states, Canada, [5] and some other countries (e.g. Italy). [6]
A diver down flag, or scuba flag, is a flag used on the water to indicate that there is a diver below. Two styles of flag are in use. Internationally, the code flag "alpha", which has a white hoist and blue swallowtail fly, is used to signal that the vessel has a diver down and other vessels should keep well clear at slow speed. [56]
Methods of attracting help include shouting, waving a straight arm, flag or surface marker buoy, blowing a whistle, flashing or swinging a torch/flashlight at night, or using a strobe at night. [3] Cylinder powered, high-pressure gas whistles may be effective even over the sound of engines. [3]
See: Dalton's law Gas law describing the relation of component pressures of gases in a mixture to the total pressure. DAN See: Divers Alert Network dangly (Derogatory) Any part of a diver's equipment that dangles in a position that might impact the bottom or get caught on the surroundings. DCAP Decompression Computation and Analysis Program: Decompression planning software by Bill Hamilton ...
An anchor may be used to moor the boat during the dive, or if conditions allow, it may be towed as a large surface marker buoy. Safety equipment may be required by legislation. This may include lifejacket or personal buoyancy aid, dive flag, flares, water bottle, mirror, whistle, an EPIRB or PLB locator beacon or hand held VHF radio..
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