FNRS -3 



LENGTH: 52.5 ft 



BEAM: 11.1 ft 



HEIGHT: NA 



DRAFT: NA 



WEIGHT (DRY): 28.1 tons 



OPERATINGDEPTH: 13,500 ft 



COLLAPSE DEPTH: 20,000 ft 



LAUNCH DATE: 1953 



HATCH DIAMETER: 16.94 in. 



LIFE SUPPORT (MAX): 48 man-hr 



TOTAL POWER: 30 kWfi 



SPEED (KNOTS): CRUISE NA 



MAX 5 



CREW: PILOTS 1 



OBSERVERS 1 



PAYLOAD: NA 



PRESSURE HULL: Spherical shape composed of cast Ni-Cr-Mo steel 6-ft 10-in. CD and ranging in thickness 3.5 in. to 5.9 in. 



BALLAST/BUOYANCY: Positive buoyancy provided by 2,794 ft-* of gasoline carried in 1 1 tanks within a thin-walled float. Negative buoyancy 



provided by 4,000 lb of steel shot electromagnetically held in four tanks. 



PROPULSION/CONTROL: Two 2-hp, reversible, DC motors provide both main propulsion and steering control. 



TRIM: No systems provided. 



POWER SOURCE: Two 28 V, pressure-compensated, lead acid batteries supply 900 amp-hr for lights and motors. One 28 V, silver zinc battery 



supplies 1 80 amp-hr for all other equipment. 



LIFE SUPPORT: Four O2 cylinders carried within the hull. CO2 is removed by soda lime. 



VIEWING: Sameas FNRS-2. 



OPERATING/SCIENTIFIC EQUIPMENT: UQC, echo sounder, depth gage, radio transceiver, compass, seawater sampler and temperature sensor. 



still camera. 



MANIPULATORS: None 



SAFETY FEATURES: All steel shot is automatically dumped upon loss of electrical power. Batteries also drop upon loss of electrical power (2,600 



lb). 



SURFACE SUPPORT: Towed on surface. 



OWNER: French Navy. 



BUILDER: French Naval Shipyard, Toulon. 



REMARKS: Inactive, retired in 1960, Deepest depth reached was 1 3,500 ft. The two major differences between FNRS-2 and 3 was that FNRS -3' s 



float was designed for surface towing and the occupants of FNRS-3 could enter the pressure hull while the vehicle was on the surface through an 



access trunk which ran through the float to the hull. 



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