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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.
A surface marker buoy (SMB) with a reel and line is often used by a dive leader to allow the boat to monitor progress of the dive group. This can provide the operator with a positive control of depth, by remaining slightly negative and using the buoyancy of the float to support this slight over-weighting.
Towing a surface marker buoy – Buoy towed by a scuba diver to indicate the diver's position. Deployment of a decompression buoy – Inflatable surface marker buoy deployed from underwater. Planned diving activities – These are mostly considered underwater work, with a few exceptions and borderline cases.
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 ...
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]