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This is a glossary of technical terms, jargon, diver slang and acronyms used in underwater diving.The definitions listed are in the context of underwater diving.
The word "cave" includes any cavern, natural pit, or sinkhole which is an extension of an entrance to a cave. [9] cave arrow. See: Line marker. Directional line markers which point the way to an exit. cave fill Filling a scuba cylinder to a pressure significantly above the rated safe working pressure (charging pressure). [9]
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 ...
[26] A single dive experience under the direct supervision of a recreational instructor offered to uncertified novices in the hope of them deciding to purchase entry level training. Some instruction on the essential skills and risks is generally provided, and the dive is generally conducted in benign conditions. [27] Compare with resort diving.
The level 1 "Supervised Diver" has sufficient knowledge, skill and experience to dive, in open water, to a recommended maximum depth of 12 m, which do not require in-water decompression stops, under the direct supervision of a dive leader, in groups of up to four level 1 scuba divers per dive leader provided the dive leader is capable of ...
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.
In ambient pressure diving, the diver is directly exposed to the pressure of the surrounding water. The ambient pressure diver may dive on breath-hold or use breathing apparatus for scuba diving or surface-supplied diving, and the saturation diving technique reduces the risk of decompression sickness (DCS) after long-duration deep dives.
Duck dive: Pushing the board underwater, nose first, and diving under an oncoming wave instead of riding it; Fade: On take-off, aiming toward the breaking part of the wave, before turning sharply and surfing in the direction the wave is breaking, a maneuver to stay in the hottest or best part of the wave [2]