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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. Snorkel (swimming) - Wikipedia

   en.wikipedia.org/wiki/Snorkel_(swimming)

   For underwater swimming and diving, the side-mounted snorkel has long been the norm, although new-generation full-face swim masks with integrated snorkels are beginning to grow in popularity for use while floating and swimming at the surface. 1950: First use of the word "snorkel" to denote a breathing device for swimmers.

4. Night diving - Wikipedia

   en.wikipedia.org/wiki/Night_diving

   A backup light can be useful if the primary light fails, [9] and is essential if doing a decompression dive without a dive computer which can be read in the dark. There are several advantages to night diving at a site that is familiar from diving there during the day. The diver who is more familiar with the site is less likely to be disoriented ...

5. Diving activities - Wikipedia

   en.wikipedia.org/wiki/Diving_activities

   Underwater football is a two-team underwater sport is played in a swimming pool with snorkeling equipment: (mask, snorkel, and fins). The goal of the game is to manoeuvre (by carrying and passing ) a slightly negatively buoyant ball from one side of a pool to the other by players who are completely submerged.

6. Thermonectus marmoratus - Wikipedia

   en.wikipedia.org/wiki/Thermonectus_marmoratus

   Thermonectus marmoratus is a relatively colorful North American species of diving beetle known by the common names sunburst diving beetle and yellow-spotted diving beetle. [1] The behavior of this diving beetle has been compared to a scuba diver, since it carries with it a bubble of air as it dives down into the water. [ 2 ]

7. Blue Hole (New Mexico) - Wikipedia

   en.wikipedia.org/wiki/Blue_Hole_(New_Mexico)

   The Blue Hole is popular with divers and swimmers. The Blue Hole of Santa Rosa, or simply the Blue Hole, is a circular, bell-shaped pool or small lake located along Route 66 east of Santa Rosa, New Mexico that is a tourist attraction and swimming venue, and one of the most popular dive destinations in the US [1] for scuba diving and training.