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  2. Dive light - Wikipedia

    en.wikipedia.org/wiki/Dive_light

    A dive light is a light source carried by an underwater diver to illuminate the underwater environment. Scuba divers generally carry self-contained lights, but surface supplied divers may carry lights powered by cable supply . A dive light is routinely used during night dives and cave dives, when there is little or no natural light, but also ...

  3. Submersible - Wikipedia

    en.wikipedia.org/wiki/Submersible

    Submersible. Retired modern submersible Star III of Scripps Institution of Oceanography. A submersible is an underwater vehicle which needs to be transported and supported by a larger watercraft or platform. This distinguishes submersibles from submarines, which are self-supporting and capable of prolonged independent operation at sea.

  4. Day shapes - Wikipedia

    en.wikipedia.org/wiki/Day_shapes

    The appropriate lights may also be displayed during the day at times of restricted visibility or other necessary circumstances. [3] Vessels under 7 meters are generally not required to display day shapes even if they are required to display lights at night. [4] A square black flag displayed over the ball may be used as a distress signal. [5]

  5. Submarine navigation - Wikipedia

    en.wikipedia.org/wiki/Submarine_navigation

    Submarines carry an inertial navigation system, which measures the boat’s motion and constantly updates position. Because it does not rely on radio signals or celestial sightings, it allows the boat to navigate while remaining hidden under the surface. To maintain accuracy, the submarine must periodically update its position using outside ...

  6. DSV Alvin - Wikipedia

    en.wikipedia.org/wiki/DSV_Alvin

    6,500 m (21,300 ft) Capacity. 680 kg (1,500 lb) payload. Crew. 3 (1 pilot, 2 scientific observers) Alvin (DSV-2) is a crewed deep-ocean research submersible owned by the United States Navy and operated by the Woods Hole Oceanographic Institution (WHOI) of Woods Hole, Massachusetts. The original vehicle was built by General Mills ' Electronics ...

  7. Subsea technology - Wikipedia

    en.wikipedia.org/wiki/Subsea_technology

    Subsea technology involves fully submerged ocean equipment, operations, or applications, especially when some distance offshore, in deep ocean waters, or on the seabed. The term subsea is frequently used in connection with oceanography, marine or ocean engineering, ocean exploration, remotely operated vehicle (ROVs) autonomous underwater vehicles (AUVs), submarine communications or power ...

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