DSV-5 Nemo

NEMO consisted of a spherical pressure hull with a inside diameter and a outside diameter, plus outside life support and operational subsystems housed below the crew compartment. The hull was made from thick transparent acrylic, Poly(methyl methacrylate), and housed a crew of two (pilot and observer). Operational subsystems included a main lead acid battery power supply, electrical distribution and control circuitry, a hydraulic system to operate a self-contained winch/anchor system, and two side-mounted thrusters for rotation and limited horizontal movement. A compressed air ballast system was used for controlling buoyancy. NEMO also carried a radio for communicating with NEMO's mothership, divers, or other submersibles. NEMO was designed for depths of up to , the depth of the continental shelf, although it was later certified for depths. Its deepest recorded dive was . Its life support system gave it an endurance of 8 hours, though it also had an emergency backup system that could provide up to an additional 24 hours. NEMO weighed and could carry a payload of . The side thrusters could propel NEMO at speeds of up to . ==Operational history==

NEMO was built alongside two additional hulls by the Southwest Research Institute at Naval Air Station Point Mugu in California, under contract for and in cooperation with the Naval Civil Engineering Laboratory (NCEL), now the Naval Facilities Engineering Command Engineering Service Center. NEMOs mission was to test the feasibility and utility of an all-acrylic spherical hull and then to support underwater construction, repair, and salvage work. NEMO made several hundred dives off the Bahamas and Channel Islands over the course of its Navy career. Details about its activities since being transferred are obscured. In July 2011, NEMO left government service and was transferred to the U.S. Navy Seabee Museum at Naval Base Ventura County, Port Hueneme, California, where it is still on display. ==See also==