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  2. Ocean optics - Wikipedia

    en.wikipedia.org/wiki/Ocean_optics

    Ocean optics is the study of how light interacts with water and the materials in water. Although research often focuses on the sea, the field broadly includes rivers, lakes, inland waters, coastal waters, and large ocean basins.

  3. 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 ...

  4. Barnegat Lighthouse - Wikipedia

    en.wikipedia.org/wiki/Barnegat_Lighthouse

    The lighthouse's beacon remained a first-class navigational light until August 1927 when the Barnegat Lightship was anchored 8 nautical miles (15 km; 9.2 mi) off the coast. This prompted the automation [broken anchor] and replacement of the first-order lens with a gas blinker. As a result, the tower's light was reduced by over 80 percent.

  5. Freedom-class littoral combat ship - Wikipedia

    en.wikipedia.org/wiki/Freedom-class_littoral...

    The Freedom class is one of two classes of the littoral combat ship program, built for the United States Navy. [20]The Freedom class was proposed by a consortium formed by Lockheed Martin as "prime contractor" and by Fincantieri (project) through the subsidiary Marinette Marine (manufacturer) as a contender for a fleet of small, multipurpose warships to operate in the littoral zone.

  6. Pentax (lens) - Wikipedia

    en.wikipedia.org/wiki/Pentax_(lens)

    The DA* lenses are more expensive and generally feature improved light transmission and larger aperture openings for better low light performance. Some DA* lenses also feature both body driven screw drive focusing and the Pentax SDM (Supersonic Drive Motor) lens based focus mechanism. Some lenses of this product line were co-developed with ...

  7. DSV Limiting Factor - Wikipedia

    en.wikipedia.org/wiki/DSV_Limiting_Factor

    Lying more than 20,000 ft (3.8 mi; 6,100 m) below the surface of the ocean, it was the deepest shipwreck ever surveyed until the discovery of USS Samuel B. Roberts on 22 June 2022. On 30 October 2019, the Petrel , a research vessel belonging to Vulcan Inc. , discovered the remains of what was believed to be Johnston near the bottom of the ...

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