SHELF DIVER (PLC4B) 



LENGTH: 23 ft 



BEAM: 5.S ft 



HEIGHT: 9 ft 



DRAFT 6.7 ft 



WEir HT (DRY): 8.S tons 



OPERATING DEPTH: 800 ft 



COLLAPSE DEPTH: 1,200 ft 



LAUNCH DATE: 1968 



HATCH DIAMETER: 23 in. 



LIFE SUPPORT (MAX): 172 man-hr 



TOTAL POWE R : 37 kWh 



SPEED (KNOTS): CRUISE 2/6 hr 



MAX 3/0.5 hr 



CREW: PILOTS 1 



OBSERVERS 3 



PAYLOAD: 1,400 lb 



PRESSURE HULL: Consists of two cylindrical compartments 0.5 in thick with 54- in. diam., hemispherical endcaps. ThehullsareA.S.M.E. SA-212 



grade B firebox quality steel. The conning tower is made of the same steel but is 3/8 in. thick increasing to 0,5 in. at the interception with the hull. 



The conning tower is 28- in. OD and 19 in. high. Hatches are made of cast A I mag 35. Gas sphere 0.5- in, H Y-100 and H Y-80 steel. 



BALLAST/BUOYANCY: Two main ballast tanks, made of 11 gage mild steel, straddle the hull and provide 845 lb of positive buoyancy. Two 



externally-mounted high pressure air bottles of 440 ft^ total capacity supply air at 2,250 psi to blow the main ballast tanks. 



PROPULSION/CONTROL: Main horizontal propulsion is provided by a stern-mounted propeller driven by a 120-VDC, l,15Q-rpm motor. Bow 



and stern thrusters are driven by a 2-hp, 120-VDC, 500-rpm motor. Bow dive planes assist in underway maneuvering. Additional assistance in 



steering is obtained from vertical and horizontal stern stabilizers. 



TRIM: Consists of one fiberglass tank forward divided into two sections of 380-lb total capacity and a steel trim tank aft of 400-lb total capacity. A 



Hypro pump (6 gpm at 500 psi) driven by an electric motor can pump water from one trim tank to another and/or to and from the sea. 



POWER SOURCE: Thirty-four V, lead-acid batteries of 95-amp-hr capacity each are located in an external banery pod. The batteries are at 



atmospheric pressure in the 0,5-in. -thick, 6.5-ft-long, 2. 1-ft-diam., 1 .200-lb pod. The pod is droppable in an emergency. 



LIFE SUPPORT: CO2 is absorbed by two 1 2-lb beds of Baralyme. Four externally-mounted bottles of O2 supply a total of 338 ft^ at 2,200 psi. 



Blowers circulate air in both compartments. Diver's gas mixture is supplied from a steel sphere of 33.5-ft-^ capacity at 2,000 psi. Emergency 



breathing from regulators in the vehicle is supplied from the high pressure air bottles used to blow the main ballast tanks. 



VIEWING: Twenty -three viewports total. 15 double-acting in main hull, 8 single-acting in conning tower. Thickness of ports is 1.5 in., ID is 6 in., 



00 is 8 in. 



OPERATING/SCIENTIFIC EQUIPMENT: UQC, Magnesyn compass, depth gages, echo sounder, radio, scanning sonar. 



MANIPULATORS: None. 



SAFETY FEATURES: The following systems can be blow free of water or jettisoned: ballast tank 845 lb, trim tanks 780 lb, battery pod (weight in 



water) 1,200 lb. Emergency batteries in hull. 



SURFACE SUPPORT: The vehicle can be carried on a truck, ship or an aircraft. It can be towed to the dive site or carried aboard its 85-ft support 



boat. 



OWNER: Operated by Inter-Sub, Marseilles, France. 



BUILDER: Perry Submarine Builders, Riviera Beach, Florida. 



REMARKS: Operational. Originally designated PLC4B. 



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