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Many of the terms are in general use by English speaking divers from many parts of the world, both amateur and professional, and using any of the modes of diving. Others are more specialised, variable by location, mode, or professional environment.
Repetitive dive which is shallower than the previous dive. [56] Multilevel dive in which a later level is shallower than an earlier level. [56] forward roll entry. See: Scuba skills#Entries. Water entry technique used by scuba divers from a boat or platform too high or unsuitable for backward roll entry. The diver bends forward at the hips and ...
A technical diver using a closed circuit rebreather with open circuit bailout cylinders returns from a 600-foot (180 m) dive. The recreational diving depth limit set by the EN 14153-2 / ISO 24801-2 level 2 "Autonomous Diver" standard is 20 metres (66 ft). This is the depth to which a diver is assumed competent to dive in terms of the standard. [18]
The common term for a place at which one may dive is a dive site (from "dive" and "site", meaning "the place, scene, or point of an occurrence or event". [64]) As a general rule, professional diving is done where the work needs to be done, and recreational diving is done where conditions are suitable.
For example, a medical statement or examination for fitness, pre-dive site assessment and briefing, safety drills, thermal protection, equipment redundancy, alternative air source, buddy checks, buddy or team diving procedures, dive planning, use of dive computers to monitor and record the dive profile and decompression status, underwater hand ...
Muck diving gets its name from the sediment that lies on the bottom at many dive sites - a frequently muddy or "mucky" environment. Other than muddy sediment, the muck dive substrate may consist of dead coral skeletons, garbage and natural detritus. The visibility is usually less than on the reef or wreck sites of the area. However, the ...
Scuba diver in Panama. Recreational diving may be considered to be any underwater diving that is not occupational, professional, or commercial, in that the dive is fundamentally at the discretion of the diver, who dives either to their own plan, or to a plan developed in consensus with the other divers in the group, though dives led by a professional dive leader or instructor for non ...
For example, due to the long swims involved in California shore diving, divers use snorkels until they reach a good start point for a dive to maximise air supply for the actual dive. [ 96 ] A snorkel can be a useful substitute for a pocket mask for in-water EAR , a diving accident victim can be towed and have rescue breathing administered ...