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  2. DSV Alvin - Wikipedia

    en.wikipedia.org/wiki/DSV_Alvin

    The sunken Alvin on the ocean bottom in June 1969, photographed by USNS Mizar (T-AGOR-11). Alvin , aboard the Navy tender ship Lulu , was lost as it was being transported on October 26, 1968. Lulu , a vessel created from a pair of decommissioned U.S. Navy pontoon boats with a support structure added on, was lowering Alvin over the side when two ...

  3. Lens (hydrology) - Wikipedia

    en.wikipedia.org/wiki/Lens_(hydrology)

    A freshwater lens on an island. In hydrology, a lens, also called freshwater lens or Ghyben-Herzberg lens, is a convex layer of fresh groundwater that floats above the denser saltwater and is usually found on small coral or limestone islands and atolls.

  4. Fresnel lens - Wikipedia

    en.wikipedia.org/wiki/Fresnel_lens

    A Fresnel lens (/ ˈ f r eɪ n ɛ l,-n əl / FRAY-nel, -⁠nəl; / ˈ f r ɛ n ɛ l,-əl / FREN-el, -⁠əl; or / f r eɪ ˈ n ɛ l / fray-NEL [1]) is a type of composite compact lens which reduces the amount of material required compared to a conventional lens by dividing the lens into a set of concentric annular sections.

  5. Common Berthing Mechanism - Wikipedia

    en.wikipedia.org/wiki/Common_Berthing_Mechanism

    Motor-deployed capture latches of two different designs (fast- and slow-acting, having short- and long-reach, respectively) were mounted on the outboard radius. Outward-oriented guide petals were also located on the outboard radius, giving the mechanism an overall diameter of about 85 inches. [71] NASA Artist's Concept of Modules (January, 1989).

  6. Landing Ship, Tank - Wikipedia

    en.wikipedia.org/wiki/Landing_Ship,_Tank

    A Canadian LST off-loads an M4 Sherman during the Allied invasion of Sicily in 1943.. A Landing Ship, Tank (LST) is a ship first developed during World War II (1939–1945) to support amphibious operations by carrying tanks, vehicles, cargo, and landing troops directly onto a low-slope beach with no docks or piers.

  7. DSV Limiting Factor - Wikipedia

    en.wikipedia.org/wiki/DSV_Limiting_Factor

    In December 2018, the Limiting Factor became the first piloted vessel to reach the deepest point of the Atlantic Ocean, [16] 8,376 m (27,480 ft) below the ocean surface to the bottom of the Puerto Rico Trench, an area subsequently referred to by world media as Brownson Deep. [17] DSV Limiting Factor at South Georgia Island

  8. Underwater vision - Wikipedia

    en.wikipedia.org/wiki/Underwater_vision

    The crystalline lenses of fishes' eyes are extremely convex, almost spherical, and their refractive indices are the highest of all the animals. These properties enable proper focusing of the light rays and in turn proper image formation on the retina. This convex lens gives the name to the fisheye lens in photography. [6]

  9. Shark River Draw - Wikipedia

    en.wikipedia.org/wiki/Shark_River_Draw

    The Shark River Draw, commonly known as the Belmar Bridge, is a moveable drawbridge that over the Shark River Inlet, an inlet at the mouth of the Shark River in the towns of Belmar and Avon-by-the-Sea Monmouth County, New Jersey, United States, just west of the Atlantic Ocean.