DEEPSTAR 4000 



LENGTH: 18 ft 



BEAM: 11tt 



HEIGHT: 7 ft 



DRAFT: 7 ft 



WEIGHT (DRY): 9 tons 



OPERATING DEPTH; 4,000 ft 



COLLAPSE DEPTH: 7,600 ft 



LAUNCH DATE: 1965 



HATCH DIAMETER: 15.75 in. 



LIFE SUPPORT (MAX): 144 man-hr 



TOTAL POWER: 49.6 kWh 



SPEED (KNOTS): CRUISE 1.5/6 hr 



MAX 3/4 hr 



CREW: PILOTS 1 



OBSERVERS 2 



PAYLOAD: 450 lb 



PRESSURE HULL: The hull consists of a 78.75-in. OD, HY-80 steel sphere with 11 openings machined into the sphere. These include two 



viewports, one camera port, one hatch, two electrical penetrations and five mechanical shaft feedthroughs. 



BALLAST/BUOYANCY: Main ballast tanks are used for positive buoyancy on the surface. Negative buoyancy is decreased by dropping small 



(3.4-lb) trim weights. DEEPSTAR dives with a 220-lb descent weight which is dropped as the vehicle nears the bottom. At the termination of a dive 



the 187-lb ascent weight is dropped allowing the vehicle to rise. A variable ballast system provides regulated increments of ballast change by transfer 



of oil between hard tanks and flexible bladders, 4,500 lb of syntactic foam (this has a density of 39 pcf) are installed to give neutral overall 



buoyancy, 



PROPULSION/CONTROL: Two fixed, reversible, 5-hp motors are mounted port and starboard just forward of amidships. The motors are variable 



in speed from 30 to 900 rpm. 



TRIM: Two pitch control cylinders mounted on the centerline, one forward and one aft, with hydraulically-activaled pistons are used to transfer 



225 lb of mercury from one end of the boat to the other allowing pitch angles of up to ±30°, 



POWER SOURCE: Lead-acid battery, 124-VDC, 400-amp-hr. Three 2-V dry cells are carried for emergency operation of radio, flasher and UQC. 



The lead-acid battery is carried externally and is pressure compensated. 



LIFE SUPPORT: CO2 is absorbed by blowing cabin air through LiOH granules then directing it downward across the viewports. O2 is supplied 



through a flow-control valve from a high pressure gaseous Q2 supply, A bypass valve allows manual control of Q2 if flow regulation fails. 



VIEWING: Two viewports provide overlapping coverage for the pilot and one observer. These ports are 21 below the horizontal centerline and 1 6 



port and starboard of the vertical centerline. Each viewport is 3.9 in. thick with an ID of 4.33 in. and an OD of 1 1.1 in. The ports are equipped with 



blowers to prevent fogging. There is also a smaller port located on the vertical centerline which is used exclusively for cine photography. This port is 



1.51 in. thick with an ID of 1.69 in, and an OD of 3.32 in. 



OPERATING/SCIENTIFIC EQUIPMENT: Gyrocompass, three sonar transducers (forward, downward, and upward-looking) with strip chart 



recorder, depth sensor, depth monitor with interior dial readout, depth indicator, current meter (speed only), odometer, water temperature probe, 



inclinometer, yaw indicator, 2-channel tape recorder, interior-mounted 16-mm cine camera (400-ft film capacity), exterior-mounted 70-mm still 



camera with two strobes. 



MANIPULATORS: One with three degrees of freedom. 



SAFETY FEATURES: Releasable forward battery (600 lb). Jettisonable manipulator. Mechanically releasable trim mercury (225 lb), backed up by 



3,000 psi N2 for angle jettison. Mechanically releasable ascent weight is 185 lb (also released by an overdepth release). Small weight dropper rack 



contains 150 lb of weights which may be released hydraulically or mechanically. An overdepth release device, independent of the pilot and power 



supplies, will release both descent and ascent weights if vehicle reaches 4,200 ft +3%, 



SURFACE SUPPORT: DEEPSTAR has no permanent support ship, but is tended by a leased vessel. The last such ship was the M/V SEARCH TIDE 



owned by Tidewater Marine, New Orleans, La. SEARCH TIDE is a typical offshore supply boat, designed to service drilling rigs in the Gulf of 



Mexico. SEARCH TIDE is 155 ft LOA with a beam of 36 ft and a draft of 11 ft. Her displacement is 199 tons. She is powered by two 1,000-hp 



diesel engines giving a cruising speed of 1 2 knots and a range of 3,700 miles. Vans mounted on the deck provide living quarters, a machine shop, a 



dark room, and a maintenance shop for DEEPSTAR's electronics, 



OWNER: Westinghouse Ocean Research and Engineering Center, Annapolis, Md. 



BUILDER: Westinghouse Electric Corp. 



REMARKS: Not operating. 



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