PC-3B 



LENGTH: 22 ft 



BEAM; 3.5 ft 



HEIGHT; 5.75 ft 



DRAFT; 3.5 ft 



WEIGHT(DRY): 2.75 tons 



OPERATING DEPTH: 600 ft 



COLLAPSE DEPTH: 900 ft 



LAUNCH DATE: 1963 



HATCH DIAMETER: 19 in. 



LIFE SUPPORT (MAX): 40 man-hr 



TOTAL POWER: 10 kWh 



SPEED (KNOTS): CRUISE 1.75/10 fir 



MAX 4/2 hr 



CREW; PILOTS 1 



OBSERVERS 1 



PAYLOAD: 300 lb 



PRESSURE HULL: Main hull of 0.5 in. -thick plate and heads of A212 steel. Canopy of 0.25-in thick plate and 3/8 in. heads of A212 steel. Motor 



room & battery compartment 0.25-in. plate and heads of A212 steel. Hatch trunk is 0.5 in. -thick S.S.ASTM A-351 casting, hatches are Almag 335 



castings. Mechanical penetrations in hull are for propeller shaft with crane seal backed up by pneurtiaticalty operated seal; two hatch openings and 



one droppable keel operating shaft. 



BALLAST/BUOYANCY: Main ballast tanks made of 1 1 & 1 2 gage A285 steel are located fore and aft and provide a displacement of 2,000 lb. Trim 



tanks may also be employed to provide 400-lb displacement. 



PROPULSION/CONTROL: Main propulsion is from a stern-mounted, 7-hp, 36-V, 855-rpm, AMis Chalmers motor with infinitely variable 



speed controls. Hydraulically-actuated rudder and bow planes provide horizontal and vertical underway maneuvering. Bow or stern thrusters of 



fractional hp available. 



TRIIV1: Two tanks, 0.25 in. thick, of A212 steel 200-lb capacity each can be blown or pumped to and from seawater or fore and aft from one tank 



to the other. Valves and piping are of stainless steel or other non-corrosive material. Trim pump is a Hypro 6 gpm at 400 psi driven by a 2.5-hp, 36-V 



60-amp, Milwaukee motor. 



LIFE SUPPORT: CO2 removal by Baralyme (4-qt supply) through which air is drawn by two 72-cfm Vane-Axial blowers. O2 is supplied from one 



externally-mounted 70-ft-*. 2,200-psi bottle connected to reducer to flowmeter and regulator. Two scuba regulators within the vehicle are connected 



to the low pressure air supply for emergency breathing. 



POWER SOURCE: Either silvercel batteries or 10 lead acid batteries may be used which are located in a pressure-resistant compartment just above 



the keel and aft. The silvercel batteries extend cruising time by a factor of 2 over the lead-acid batteries. 



VIEWING: Seventeen viewports throughout the vehicle of 1.5-in. thickness, ID of 6 in., OD of 8 in. 



OPERATING/SCIENTIFIC EQUIPMENT: UQC, radio, echo sounder, magnetic compass, forward-scanning sonar. 



MANIPULATORS: None. 



SAFETY FEATURES: Pressure hull can be pressurized and flooded for escape. By blowing tanks or dropping ballast the following positive 



buoyancy can be obtained; main ballast tank 200 lb, trim tanks 400 lb, weight drop 75 lb. Main ballast tanks can receive air from ship or scuba diver 



with air bottle. 



SURFACE SUPPORT: SOO. 



OWNER: International Underwater Contractors, New York. 



BUILDER: Perry Submarine Builders, Riviera Beach, Fla. 



REMARKS: Has not dived for several years, but can be available on short notice if required. Renamed TECHDI VER when purchased by its present 



owner. 



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