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  2. 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 ...

  3. Underwater videography - Wikipedia

    en.wikipedia.org/wiki/Underwater_videography

    In 1909, Albert Samama Chikly took the first underwater shot. [1] In 1910, he filmed Tuna fishing in Tunisia under the patronage of Albert I, Prince of Monaco. [2] In 1940 Hans Hass completed Pirsch unter Wasser (i.e. Stalking under Water) which was published by the Universum Film AG, lasted originally only 16 minutes and was shown in theatres before the main movie, but would eventually be ...

  4. Diving equipment - Wikipedia

    en.wikipedia.org/wiki/Diving_equipment

    Diving equipment, or underwater diving equipment, is equipment used by underwater divers to make diving activities possible, easier, safer and/or more comfortable. This may be equipment primarily intended for this purpose, or equipment intended for other purposes which is found to be suitable for diving use.

  5. Gel pen - Wikipedia

    en.wikipedia.org/wiki/Gel_pen

    Gel pens can be used for many types of writing and illustration. The general design of a gel pen is similar to that of a regular ink-based pen, with a barrel containing the writing mechanism and a cap, and a reservoir filled with ink. At the end of the ink tube is an ink "follower", made of more viscous gelled material which is usually ...

  6. Thermal balance of the underwater diver - Wikipedia

    en.wikipedia.org/wiki/Thermal_balance_of_the...

    Dry suits are generally used where the water temperature is between −2 and 15 °C (28 and 59 °F). Water is prevented from entering the waterproof shell of the suit by seals at the neck and wrists and the opening for getting the suit on and off is typically closed by a waterproof zipper. The suit insulates the wearer by maintaining a layer of ...

  7. Decompression practice - Wikipedia

    en.wikipedia.org/wiki/Decompression_practice

    The PADI Nitrox tables are laid out in what has become a common format for no-stop recreational tables Video: Setting the bezel of a diving watch to the start time (minute hand) of a dive at the beginning. Divers used this in conjunction with a depth gauge and a decompression table to calculate the remaining safe dive time (or required stops ...

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