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Nr-1 Deep Submergence Craft | style="text-align: center" colspan="2"| | | tyle="color: white; height: 30px; background: navy;"| | style="color: white; height: 30px; background: navy;"| Career | | rdered: | | | aid down: | | | aunched: | 25 January 1969 | | eployed: | 27 October 1969 | | omeport: | Groton, Connecticut | | olspan="2" align="center" style="color: white; background: navy;"|General Characteristics | | isplacement: | 400 tons | | ength: | 45 meters (150 feet) overall, 29.3 meters (96 feet 1 inch) pressure hull | | iameter: | 3.8 meters (12 feet 6 inches) | | aximum beam (at stern stabilizers): | 4.8 meters (15 feet 10 inches) | | aximum navigational draft: | 4.6 meters (15 feet 1 inch) | | OX keel depth (below base-line): | 1.2 meters (4 feet) | | ropulsion: | one nuclear reactor, one turbo-alternator, two external motors, two propellers, four ducted thrusters (two horizontal, two vertical) | | peed: | 4.5 knots surfaced, 3.5 knots submerged | | epth: | 725 meters (2375 feet) | | ndurance: | 210 man-days nominal, 330 man-days maximum | | omplement: | two officers, three crewmen, two scientists | | rmament: | none | | otto: | The NR-1 Deep Submergence Craft is a unique US Navy nuclear-powered ocean engineering and research submarine. Casually known as "Nerwin," it was built by the Electric Boat Division of General Dynamics at Groton, Connecticut. It was launched on 25 January 1969, completed her initial sea trials 19 August 1969, and is homeported at Naval Submarine Base New London. It was never named or commissioned. The United States Navy is allocated a specific number of warships by the U.S. Congress. Not only did Admiral Hyman Rickover not want to "use up" one of those authorizations, but he also wanted to avoid the oversight that a warship receives from various bureaus. NR-1 maneuvers by four ducted thrusters, two in the front and two in the rear. The vehicle also has planes mounted on the sail, and a conventional rudder. NR-1's missions have included search, object recovery, geological survey, oceanographic research, and installation and maintenance of underwater equipment. NR-1's unique capability to remain at one site and completely map or search an area with a high degree of accuracy has been a valuable asset on several occasions. Following the loss of the Space Shuttle Challenger in 1986, NR-1 was used to search for, identify, and recover critical parts of the Challenger craft. Because it can remain on the sea floor without resurfacing frequently, NR-1 was a major tool for searching deep waters. NR-1 remained submerged and on station even when heavy weather and rough seas hit the area and forced all other search and recovery ships into port. The NR-1 performs underwater search and recovery, oceanographic research missions and installation and maintenance of underwater equipment, to a depth of almost half a mile. Its features include extendable bottoming wheels, three viewing ports, exterior lighting and television and still cameras for color photographic studies, an object recovery claw, a manipulator that can be fitted with various gripping and cutting tools and a work basket that can be used in conjunction with the manipulator to deposit or recover items in the sea. Surface vision is provided through the use of a television periscope permanently installed on a mast in her sail area. NR-1 has sophisticated electronics and computers that aid in navigation, communications, and object location and identification. It can maneuver or hold a steady position on or close to the seabed or underwater ridges, detect and identify objects at a considerable distance, and lift objects off the ocean floor. NR-1 can travel submerged at approximately four knots for long periods, limited only by its supplies. It can study and map the ocean bottom, including temperature, currents, and other information for military, commercial and scientific uses. Its nuclear propulsion provides independence from surface support ships and essentially unlimited endurance. NR-1 is generally towed to and from remote mission locations by an accompanying surface tender, which is also capable of conducting research in conjunction with the submarine. NR-1's current mothership is the SSV Carolyn Chouest. Sources
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