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  2. Full-face diving mask - Wikipedia

    en.wikipedia.org/wiki/Full-face_diving_mask

    A diver in a pool wearing an AGA full face mask A diver wearing an Ocean Reef full face mask Head protection helmet for use with Ocean Reef full face diving mask. A full-face diving mask is a type of diving mask that seals the whole of the diver's face from the water and contains a mouthpiece, demand valve or constant flow gas supply that provides the diver with breathing gas. [1]

  3. Underwater vision - Wikipedia

    en.wikipedia.org/wiki/Underwater_vision

    Scuba diver with bifocal lenses fitted to a mask. Underwater vision is the ability to see objects underwater, and this is significantly affected by several factors. Underwater, objects are less visible because of lower levels of natural illumination caused by rapid attenuation of light with distance passed through the water. They are also ...

  4. Diving mask - Wikipedia

    en.wikipedia.org/wiki/Diving_mask

    A diving mask (also half mask, dive mask or scuba mask) is an item of diving equipment that allows underwater divers, including scuba divers, free-divers, and snorkelers, to see clearly underwater. [1] [2] Surface supplied divers usually use a full face mask or diving helmet, but in some systems the half mask may be used. [2]

  5. Hypnotic underwater footage shows divers swimming through ...

    www.aol.com/hypnotic-underwater-footage-shows...

    Bubble rings occur underwater when trapped air is released in a circular shape.

  6. Hypnotic underwater footage shows divers swimming through ...

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  7. Underwater diving - Wikipedia

    en.wikipedia.org/wiki/Underwater_diving

    Views through a flat mask, above and below water. Underwater vision is affected by the clarity and the refractive index of the medium. Visibility underwater is reduced because light passing through water attenuates rapidly with distance, leading to lower levels of natural illumination.

  8. Snorkeling - Wikipedia

    en.wikipedia.org/wiki/Snorkeling

    Snorkeling (British and Commonwealth English spelling: snorkelling) is the practice of swimming face down on or through a body of water while breathing the ambient air through a shaped tube called a snorkel, usually with swimming goggles or a diving mask, and swimfins. In cooler waters, a wetsuit may also be worn. The snorkel may be an ...

  9. Human physiology of underwater diving - Wikipedia

    en.wikipedia.org/wiki/Human_physiology_of...

    Scuba diver with bifocal lenses fitted to a mask. Underwater, things are less visible because of lower levels of natural illumination caused by rapid attenuation of light with distance passed through the water. They are also blurred by scattering of light between the object and the viewer, also resulting in lower contrast.

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