ALVIIM 



LENGTH: 25 ft 



BEAM: 8ft 



HEIGHT: 13*' 



DRAFT: T/, it 



WEIGHT (DRY): 16'/. tons 



OPERATING DEPTH: 12.000 ft 



COLLAPSE DEPTH: 18.000 ft 



LAUNCH DATE: 1964 



HATCH DIAMETER: 19 in. 



LIFE SUPPORT (MAX); 216 manhr 



TOTAL POWER: 40'/. kWh 



SPEED (KNOTS): CRUISE 1/8 hr 



MAX 2/2 hr 



CREW: PILOTS 1 



OBSERVERS 2 



PAYLOAD: 1.000 lb 



PRESSURE HULL: Spherical shape. Composed of Navy 621.08 titanium. 7-ft CD. 1.97 in. thick to 2'/. in. at inserts. 



BALLAST/BUOYANCY: MBT's provide 1,500 lbs of surface buoyancy. VBT's consist of hard tanks and pump operable to 12,000 ft. Syntactic 



foam provides approximately 4,000 lb of positive buoyancy. A 250-lb weight is carried to decrease descent time; it is dropped at the bottom; 



another 250-lb weight is dropped for ascent. 



PROPULSION/CONTROL: Main propulsion IS from a 10-hp hydraulic motor driving a 50-in.-diam. propeller trainable 50° left or right. Thrusters 



are located amidships which are powered by 6-hp hydraulic motors and are rotatable 360 in the vertical plane. 



TRIM: Bow angles Of +1 0° are Obtained by transferring 450 lb of mercury forward or aft. 



POWER SOURCE: Three, pressure-compensated boxes of lead-acid batteries. Two boxes supply 30 V. the third supplies 60 V. Four 4-amp-hr 



nickel-cadmium batteries supply emergency power. 



LIFE SUPPORT: Gaseous O2 in pressure hull. LiOH is used to remove COt. Oj and CO2 monitors. 



VIEWING: Four large viewports forward; these are 3'A in. thick, 5-in. ID and 12-in. OD. A smaller viewport is in the hatch cover which is 2 in. thick, 



2-in. ID and 6-in. OD. 



OPERATING/SCIENTIFIC EQUIPMENT: UQC with transponder interrogator. Four pressure depth gages, up/down echo sounder, TV, pinger, 



current meter, CTFM sonar, gyrocompass, two-35-mm still cameras, one 8-mm & one 16-mm cine cameras. 



MANIPULATORS: One with six degrees of freedom. 



SAFETY FEATURES: Manipulator, batteries (3,400 lb) and specimen basket are attainable. Pressure sphere releasable (2.000 lb of positive 



buoyancy). Closed circuit emergency breathing off normal O2 supply. Distress rockets and flares, strobe lights, life vests, radio homing beacon. 



SURFACE SUPPORT: Supported by the catamaran LULU. 105 ft LOA. 48-ft beam, 1 2-ft draft, 450-ton displacement, max. speed 6 knots, 



propulsion from three 200-hp outboard motors. Seventeen people constitute the system's crew. 



OWNER. U.S. Navy-owned. Operated by Woods Hole Oceanographic Institution, Woods Hole, Mass. 



BUILDER: General Mills/Litton Industries. Minneapolis. Minn. 



REMARKS: Steel pressure hull replaced by titanium hull in 1 973. thereby increasing depth range from 6,000 to 1 2,000 ft. 



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