NEREID 330 



LENGTH: 29 ft 



BEAM: lift 



HEIGHT: 11 ft 



DRAFT: 7ft 



WEIGHT (DRY): 11 tons 



OPERATING DEPTH: 330 ft 



COLLAPSE DEPTH: 500 ft 



LAUNCH DATE: 1972 



HATCH DIAMETER: 22.8 in. 



LIFE SUPPORT (MAX): 96 man-hr 



TOTAL POWER: 40 kWh 



SPEED (KNOTS): CRUISE 2/8 hr 



MAX 4 



CREW: PILOTS 1 



OBSERVERS 2 



PAYLOAD: 5,500 lb 



PRESSURE HULL: Cylindrical shape steel hull, OD of 70 in. symmetrical axis perpendicular to fore-aft axis. Dished ends. Two cylindrical 



extensions, OD of 20 in. on port and starboard side, length of 13 ft. 



BALLAST/BUOYANCY: Main ballast tank is half filled with seawater and air compressed at a higher pressure than the 330 ft operating depth; to 



obtain negative buoyancy a pump is used to add more water. To obtain positive buoyancy a purge valve is opened which blows the main ballast dry. 



One 200-1 atmospheric tank provides auxiliary negative buoyancy. 



PROPULSION/CONTROL: A stern-mounted, lalerally-trainable, variable-pitch propeller driven by a 10-hp motor provides main horizontal 



propulsion. A 2.5-hp lateral thruster mounted aft of the pressure hull assists in fine maneuvering control. 



TRIM: Up/down bow angles of 30 are obtainable by hydraulically moving the main battery housing fore or aft. 



POWER SOURCE: Nine 12-V each, lead-acid batteries are carried in two longitudinal pressure-resistant tubes below the vehicle and deliver 200 V. 



Four 12-V, lead-acid batteries supply 24 V. 



LIFE SUPPORT: Two 12 I capacity tanks 



VIEWING: Thirteen viewports. 



OPERATING/SCIENTIFIC EQUIPMENT: UQC, CTFM, gyrocompass, depth indicator speed iog, downward-looking echo sounder. 



MANIPULATORS: Two; one is 15 ft long and capable of 2,500-lb lift; the second is a smaller one attached to the larger arm which is used to 



perform delicate operations. Installed on starboard side near center of buoyancy. Gripping force of the large claw is 6 tons. 



SAFETY FEATURES: Internally-pressurized buoyancy tank may be blown by entrapped air to operational depth. Hand released reserve ballast 



(700 lb). Emergency breathing equipment for leaving flooded hull through escape hatch. 



SURFACE SUPPORT: SOO. 



OWNER: Nereid nv. Schiedam, Holland. 



BUILDER: Same as above. 



REMARKS: Operating. A 700-ft lock-out NEREID 700 was scheduled for launching in 1973, but nothing has been heard of this project since May 



1973. 



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