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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. 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.

4. List of diver certification organizations - Wikipedia

   en.wikipedia.org/wiki/List_of_diver...

   PZPn - Polski Zwiazek Pletwonurkowania (Polish Underwater Sports Federation) CMAS code POL/F01 [1] Ronilacki Savez Crne Gore (Diving Association of Montenegro) CMAS code MNE/F00 [1] RAID - Rebreather Association of International Divers – Recreational diver training and certification agency [7]

5. Wreck diving - Wikipedia

   en.wikipedia.org/wiki/Wreck_diving

   Non-penetration wreck diving is the least hazardous form of wreck diving, although divers still need to be aware of the entanglement risks presented by fishing nets and fishing lines which may be snagged to the wreck (wrecks are often popular fishing sites), and the underlying terrain may present greater risk of sharp edges.

6. Diving equipment - Wikipedia

   en.wikipedia.org/wiki/Diving_equipment

   Underwater writing slates and pencils are used to transport pre-dive plans underwater, to record facts while underwater and to aid communication with other divers. Dive lights , which are usually waterproof and pressure rated torches or flashlights , are essential for safety in low visibility or dark environments such as night diving and wreck ...

7. Diver navigation - Wikipedia

   en.wikipedia.org/wiki/Diver_navigation

   Nav finder and underwater compass – basic underwater navigation tools Suunto SK-7 diving compass in aftermarket wrist mount with bungee straps. Diver navigation, termed "underwater navigation" by scuba divers, [1] is a set of techniques—including observing natural features, the use of a compass, and surface observations—that divers use to navigate underwater.