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USS Dolphin (AGSS-555) was a United States Navy diesel-electric deep-diving research and development submarine. She was commissioned in 1968 and decommissioned in 2007. Her 38-year career was the longest in history for a US Navy submarine to that point. She was the Navy's last operational conventionally powered submarine. [2]
Dolphin's actual test depth is still classified, and the Navy will only say it's more than 3000 ft. Soviet submarine K-278 Komsomolets has a test depth of 1,000 metres (3,300 ft).(The Death of the USS Thresher: The Story Behind History's Deadliest ... By Norman Polmar p.173) So I'm skeptical of the "deepest dive" claim.
Dolphin was the penultimate design in the V-boat series. With a length of 319 ft (97 m) and a displacement only a little more than half that of the previous three large cruiser submarines (1,718 long tons (1,746 t) surfaced, 2,240 long tons (2,276 t) submerged), Dolphin was clearly an attempt to strike a medium between those latter submarines and earlier S-class submarines, which were little ...
Deepsea Challenger (DCV 1) was a 7.3-metre (24 ft) deep-diving submersible designed to reach the bottom of the Challenger Deep, the deepest-known point on Earth.On 26 March 2012, Canadian film director James Cameron piloted the craft to accomplish this goal in the second crewed dive reaching the Challenger Deep.
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Deep Submergence Vessel NR-1 was a unique United States Navy (USN) nuclear-powered ocean engineering and research submarine, built by the Electric Boat Division of General Dynamics at Groton, Connecticut. NR-1 was launched on 25 January 1969, completed initial sea trials 19 August 1969, and was home-ported at Naval Submarine Base New London.
Only 141 of the USS Johnston's 327 crew survived when the ship was sunk on October 25, 1944, according to the Navy. Dive to world's deepest known shipwreck reaches U.S. warship Skip to main content