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2. Dive light - Wikipedia

   en.wikipedia.org/wiki/Dive_light

   They are generally not important for dive safety, but are required for the video camera to get an acceptable image quality, either for video recording, or for the surface team to monitor the work done by the diver. Modern underwater video lights are now relatively small, have run times of 45–60 minutes and output 600–8000 lumens.

3. Underwater photography - Wikipedia

   en.wikipedia.org/wiki/Underwater_photography

   A video light is a powerful light source used primarily for shooting video in environments with insufficient natural light, but can also be used as the primary light source for still photography. Placement of the video light follows the same recommendations as for flash photography, with the advantage that the illumination can be clearly seen ...

4. Glossary of underwater diving terminology: H–O - Wikipedia

   en.wikipedia.org/wiki/Glossary_of_underwater...

   A robust and air-tight bag with straps, which is used to lift heavy objects underwater by means of the bag's buoyancy when filled with air. [61] light Alternative term for a viewport of a standard diving helmet. light head. See: Dive light#Canister light. The part of a canister light (q.v.) which emits light, and is held in the hand or mounted ...

5. 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 ...

6. Diver communications - Wikipedia

   en.wikipedia.org/wiki/Diver_communications

   when at anchor, in addition to the lights or shapes prescribed in sub-paragraphs 1 and 2, the light, lights or shape prescribed in Rule 30. A vessel engaged in dredging or underwater operations , when restricted in her ability to manoeuvre, shall exhibit the lights and shapes prescribed in sub-paragraphs (1, 2 and 3 above) of this Rule and ...

7. Magnesium torch - Wikipedia

   en.wikipedia.org/wiki/Magnesium_torch

   An underwater torch is available in the Education Edition of the Minecraft sandbox video game, created by combining a torch with magnesium on a crafting table. [7] Featured occasionally in the Sea Hunt television show. [8] Magnesium torches were used in the documentary series The Undersea World of Jacques Cousteau. "The Secrets of the Sunken ...