NEMO 



LENGTH: 



BEAM: 



HEIGHT: 



DRAFT: 



WEIGHT (DRY): 



OPERATING DEPTH: 



7.5 ft 

 7.5 ft 

 9.2 ft 

 1 ft 

 4 tons 

 600 ft 



COLLAPSE DEPTH: 4,150ft 



LAUNCH DATE: 1970 



HATCH DIAMETER: 18.7 in. 



LIFE SUPPORT (MAX): 64 man hr 



TOTAL POWER: 15 kWh 



SPEED (KNOTS): CRUISE 0.75/8 hr 



MAX NA 



CREW: PILOTS 1 



OBSERVERS 1 



PAYLOAD 850 lb (incl. crewl 



PRESSURE HULL: Acrylic plastic (Plexiglas G) sphere composed of 12 spherical pentagons bonded together with adhesive. Hull is 66-in. OD and 



2.5 in. thick. Top (hatch) and bottom plates are of cadmium-plated 41 30 steel. Bottom plate is for passage of penetrators. Hull weighs 1 ,500 lb in air 



and displaces 5,500 lb rn water. 



BALLAST/BUOYANCY: Mam ballast js supplied by an B-ft^ capacity free-flooding cylindrical tank below the pressure hull. Deballasting is 



accomplished by six 50-ft^ capacity air bottles at 2,250 psi. which make available 19-ft^ (371 SCF) of air at 600-ft depth and allow two complete 



cycles at this depth. A free-flooding auxiliary ballast tank aft has a capacity of 2 ft^. 



PROPULSION/CONTROL: Two 1.5-hp hydraulic motors mounted on each side of the vehicle drive 8-in. diam., shrouded propellers, which serve to 



rotate the vehicle in the lateral plane and to allow short excursions when at neutral buoyancy. Within the service module is a hydraulically-driven 



winch ( 1 ,200 ft of 0.25-in. wire ropes) which the pilot can operate to provide vertical excursions (anchor weight 380 lb). 



TRIM: Not required. 



POWER SOURCE; Main power is from twenty -one-6-V, 1 50-amp hr, pressure-compensated, lead-acid batteries supplying 120 V. Secondary power 



is supplied by a 20-amp-hr, silver-zinc battery carried within the pressure sphere. 



LIFE SUPPORT: O2 is stored in two 50-ft-^ -capacity tanks at 1 ,600 psi and automatically bled into the sphere at a selected rate. CO2 is removed by 



blowing air through an 8-lb cannister of Baralyme. Silica gel (50-in,-*) removes water vapor. Partial pressure of O2, cabin pressure and COt content 



are continuously monitored, a Drager kit serves as backup measuring device. 



VIEWING: Panoramic viewing through the plastic pressure hull. 



OPERATING/SCIENTIFIC EQUIPMENT: UQC (8.08 kHz). 



MANIPULATORS: None. 



SAFETY FEATURES: Two closed-circuit O2 rebreathers for emergency use. Internal emergency power supply can actuate anchor cable cutter drop 



battery pack (2,170 lb in air), blow ballast tanks and operate normal life support system. There is also a manual anchor cable cutter. 



SURFACE/SHORE SUPPORT: Air, ship, truck transportable. Launched/retrieved at sea from any ship of 100 tons or greater with an over-the-side 



handling capacity of at least 10 tons. 



OWNER: U.S. Naval Undersea Center, San Diego, California. 



BUILDER: U.S. Naval Civil Engineering Laboratory, Port Hueneme, California. 



REMARKS: Not operating. Now at Southwest Research tnst. 



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