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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 ...
Surface marker buoy to track a group of divers. Drift diving is a type of scuba diving where a diver is transported by water movement caused by the tide, [1] an ocean current or in a river. The choice whether to drift dive depends on the purpose of the dive and whether there is an option.
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..
The length of the distance line used is dependent on the plan for the dive. An open water diver using the distance line only for a surface marker buoy may only need 50 metres / 165 feet, whereas a cave diver may use multiple reels of lengths from 50 ft (15 m) to 1000+ ft (300 m). [citation needed]
A commonly used procedure for ascent in open water when not ascending along a shot line or anchor cable is to use the more recently developed delayed surface marker buoy, or decompression buoy, inflated and deployed at the start of the ascent to notify any vessel in the vicinity of presence and location of the divers as well as helping to ...
Normal requirements for night diving are a dive light, and adequate protection from exposure. [1] Some precautions and skills for night diving include: avoiding shining the light in other divers' eyes, to be aware of and use surface light signals for bearings, and if appropriate to use an illuminated shotline buoy. [1]
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Shot buoys mark dive sites for the boat safety cover of scuba divers so they can descend to dive sites more easily in conditions of low visibility or tidal currents and more safely do decompression stops on their ascents. Surface marker buoys are taken on dives by scuba divers to mark their positions underwater. [15]
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