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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.
A magnesium torch is a bright light source made from magnesium, which can burn underwater and in all weather conditions. They are used for emergency illumination for railroad applications. They were also used in the 1950s up to the early 1970s as a light source for scuba diving, and were featured occasionally in television shows. A relay of ...
The surface of the lotus plant’s leaves repels dirt and water so well that this self-cleaning quality was dubbed the “lotus effect” in 1977. In 1999, the German building company Sto released ...
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 ...
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Successful underwater imaging is usually done with specialized equipment and techniques, and it offers unusual and rare photographic opportunities and subjects. Underwater orienteering is a competitive underwater sport that uses recreational open circuit scuba equipment, fins, a compass and a counter meter to measure the distance covered. The ...
Unlike air, [citation needed] water attenuates light exponentially. This results in hazy images with very low contrast. [clarification needed] The main reasons for light attenuation are light absorption (where energy is removed from the light) and light scattering, by which the direction of light is changed. Light scattering can further be ...
From shoes, clothes, cutlery, and even appliances – it seems that manufacturers don't build things that last anymore.To highlight this phenomenon, we've collected the most frustrating and ...
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