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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 ...
Distance lines are wound on to a spool or a reel. [9] 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).
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.
Diving reel, dive spool or line holder to store and transport a distance line or line for a surface marker buoy. A dive spool, or line spool, is a short cylindrical tube with a large flange at each end, around which a length of line can be wound, and a line holder is a flat H-shaped frame or piece of rigid sheet material on which a length of ...
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 (160 feet), whereas a cave diver may use multiple reels of lengths from 25 ft (7.6 m) to 1000+ ft (300 m).
A decompression buoy is deployed towards the end of the dive as a signal to the surface that the diver has started to ascend. [107] This kind of buoy is not usually towed, so drag is not a problem. Visibility to a surface observer depends on colour, reflectivity, length above the water, and diameter.