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2. Dive light - Wikipedia

   en.wikipedia.org/wiki/Dive_light

   Backup lights are carried in case the primary light fails during the dive. This is particularly important in cave and wreck penetration diving, where the light is required to facilitate navigation out of the enclosed space. Cave divers are trained to carry three dive lights as a result of an accident analysis by Sheck Exley published in 1977 ...

3. Index of recreational dive sites - Wikipedia

   en.wikipedia.org/wiki/Index_of_recreational_dive...

   Dosthill quarry – Flooded quarry in England used for scuba diving; Dragon Hole – Deep underwater sinkhole in the South China Sea; SMS Dresden (1917) – Light cruiser of the German Imperial Navy; SS D.R. Hanna – 552-foot steel freighter that sank on Lake Huron in 1919; USCGC Duane – United States Coast Guard cutter

4. Recreational dive sites - Wikipedia

   en.wikipedia.org/wiki/Recreational_dive_sites

   Wall diving is reef diving where the main characteristic of the site is that the terrain is predominantly near vertical. It is basically an underwater cliff. The height of the wall can vary from a few metres to hundreds of metres. The top of the wall must be within diving depth, but the bottom may be far below or reasonably close to the surface.

5. Outline of recreational dive sites - Wikipedia

   en.wikipedia.org/wiki/Outline_of_recreational...

   Wall diving is a form of reef diving, where The main characteristic of the sites is that the terrain is predominantly near vertical. The height of the wall can vary from a few metres to hundreds of metres. [1] The top of the wall must be within diving depth, but the bottom may be far below or reasonably close to the surface.

6. Fishing light attractor - Wikipedia

   en.wikipedia.org/wiki/Fishing_light_attractor

   In this video, dozens of 15-18 inch speckled trout are attracted to a 1000 W green light mounted on a pier. A fishing light attractor is a fishing aid that uses lights attached to a structure above water or suspended underwater to attract fish and members of their food chain.

7. Outline of underwater diving - Wikipedia

   en.wikipedia.org/wiki/Outline_of_underwater_diving

   Underwater diving can be described as all of the following: A human activity – intentional, purposive, conscious and subjectively meaningful sequence of actions. . Underwater diving is practiced as part of an occupation, or for recreation, where the practitioner submerges below the surface of the water or other liquid for a period which may range between seconds to the order of a day at a ...