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NR-1 ' s missions included search, object recovery, geological survey, oceanographic research, and installation and maintenance of underwater equipment. NR-1 had the unique capability to remain at one site and completely map or search an area with a high degree of accuracy, and this was a valuable asset on several occasions.
Emergency separation General layout. Alvin was designed as a replacement for bathyscaphes and other less maneuverable oceanographic vehicles. Its more nimble design was made possible in part by the development of syntactic foam, which is buoyant and yet strong enough to serve as a structural material at great depths.
A full-scale wooden mock-up was built to engineer the interior spaces. The project was classified as top-secret at that time. [citation needed] At that time it did not have a conning tower entry and it immediately flooded and sank. [citation needed] The tower entry was designed and added and in the first test, the submarine turned upside down.
NR-1 reactor. one-of-a-kind reactor built for the U.S. Navy research submarine NR-1; S1C reactor. land-based prototype for USS Tullibee (SSN-597); located at Windsor, Connecticut
Debris from the imploded OceanGate Titan submersible were found and recovered from the ocean floor this past week
MV Carolyn Chouest is a chartered support ship for the United States Navy that was originally assigned to the Special Missions Program to support NR-1, the deep submergence craft. She towed NR-1 between work areas, served as a floating supply warehouse and provided quarters for extra crew until the NR-1 was removed from service in 2008.
Submarine escape trunk View inside a submarine escape trunk, looking up from below the lower hatch. An escape trunk is a small compartment on a submarine which provides a means for crew to escape from a downed submarine; it operates on a principle similar to an airlock, in that it allows the transfer of persons or objects between two areas of different pressure.
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