DSV-5 Nemo

DSV-5 NEMO on display at the Seabee Museum
History
United States
Builder	Naval Civil Engineering Laboratory
Launched	1970
Commissioned	1970
Decommissioned	30 September 1986
Fate	Transferred to "other government agencies" (likely CIA)
Status	On display at U.S. Navy Seabee Museum
General characteristics
Class and type	Alvin-class deep submergence vehicle
Displacement	8,000 lb (3.6 t)
Length	66 in (1.7 m)
Beam	80 in (2.0 m)
Draft	110 in (2.8 m)
Speed	.75 knots (1.39 km/h; 0.86 mph)
Endurance	8 hours
Test depth	600 ft (180 m)
Complement	2 (pilot and observer)

DSV-5, ex-NEMO (Naval Experimental Manned Observatory), was a submersible used by the United States Navy between 1970 and 1986 to oversee and observe undersea construction work.^[1] NEMO had a spherical transparent acrylic hull, which gave occupants panoramic vision. NEMO was the first submersible with a hull made entirely out of transparent acrylic (Plexiglass), and much of her career was spent testing this hull design.^[2] NEMO was found to be an effective observation platform, despite not being able to hover in place, and acrylic-hulled submersibles have continued to be built and operated in the United States. NEMO is considered part of the Alvin class of Deep Submergence Vehicles despite bearing little resemblance to the other subs of the class.^[3][4] NEMO was transferred to "other government agencies" (likely the CIA^[5]) in 1986 and retired from government service in 2011.^[2] It was then given to the U.S. Navy Seabee Museum, where it remains on display.