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  2. Cold shock response - Wikipedia

    en.wikipedia.org/wiki/Cold_shock_response

    The physiological response to a sudden immersion in cold water may be divided in three or four discrete stages, with different risks and physiological changes, all being part of an entity labelled as Cold Water Immersion Syndrome. Although this process is a continuum, the 4 phases were initially described in the 1980s as follows: [3] [4]

  3. What is the boat jumping challenge seen on social media? - AOL

    www.aol.com/news/tiktok-boat-jumping-challenge...

    It’s where you get in a boat going at a high rate of speed, you jump off the side of the boat, don’t dive, you’re jumping off feet first and you just kinda lean into the water,” he said ...

  4. Personal flotation device - Wikipedia

    en.wikipedia.org/wiki/Personal_flotation_device

    Personal flotation devices being worn on a navy transport . A personal flotation device (PFD; also referred to as a life jacket, life preserver, life belt, Mae West, life vest, life saver, cork jacket, buoyancy aid or flotation suit) is a flotation device in the form of a vest or suit that is worn by a user to prevent the wearer from drowning in a body of water.

  5. Hydraulic jump - Wikipedia

    en.wikipedia.org/wiki/Hydraulic_jump

    The stationary hydraulic jump – rapidly flowing water transitions in a stationary jump to slowly moving water as shown in Figures 1 and 2. The tidal bore – a wall or undulating wave of water moves upstream against water flowing downstream as shown in Figures 3 and 4. If one considers a frame of reference which moves along with the wave ...

  6. Large rock or log caused Sierra Nevada whirlpool where three ...

    www.aol.com/news/three-friends-drowned-together...

    The Seven Teacups trail in the Sierra Nevada, in which three friends tragically lost their lives trying to save one another, had "significant flowing water" and other potential challenges for hikers.

  7. A Florida Keys man jumped in the water to retrieve a pool ...

    www.aol.com/florida-keys-man-jumped-water...

    Lawrence Boyts, 68, of Cudjoe Key, was going for a pool noodle that sailed off his boat into the water on Friday, Aug. 12, while he and his wife Donna were anchored at Sawyer Key in the Lower Keys ...

  8. Diving hazards - Wikipedia

    en.wikipedia.org/wiki/Diving_hazards

    Divers must avoid injuries caused by changes in pressure. The weight of the water column above the diver causes an increase in pressure in proportion to depth, in the same way that the weight of the column of atmospheric air above the surface causes a pressure of 101.3 kPa (14.7 pounds-force per square inch) at sea level.

  9. Scuba skills - Wikipedia

    en.wikipedia.org/wiki/Scuba_skills

    Entry from a steep rocky shore: proper approach depends on the details of the shoreline topography, water depth, and wave action. The diver may be able to jump in fully kitted, or sit at the water's edge to fit mask and fins, and then slide or step in. In some circumstances a diver may have to climb down into the water and fit the fins in the ...