K-250 



LENGTH: 10.5 ft 



BEAM: 4.7 ft 



HEIGHT: 5 ft 



DRAFT: 3 ft 



WEIGHT (DRY) 2.200 lb 



OPERATING DEPTH: 250 ft 



COLLAPSE DEPTH: NA 



LAUNCH DATE: ca. 1966 



HATCH DIAMETER: 22 in. 



LIFE SUPPORT (MAX): 6 man-hr 



TOTAL PO\A(ER: NA 



SPEED (KNOTS): CRUISE NA 



MAX 2.5 



CREW: PILOTS 1 



OBSERVERS O 



PAYLOAD: 280 lb 



PRESSURE HULL: Cylindrical shape composed of 0.25-in-thick gage steel with internal "T" bar frames. 



BALLAST/BUOYANCY: Two fiberglass main ballast tanks, free-flooding and blown by compressed air. A variable ballast tank within the hull 



provides buoyancy changes when submerged. The VBT is normally pumped dry, but can be blown dry if necessary. 



PROPULSION/CONTROL: Two motors (port/starboard) are rotatable 360*^ in the vertical. The motors have three speeds forward and are manually 



rotated. A rudder provides underway directional control. 



TRIM: No system provided. 



POWER SOURCE; Four 12-V, lead-acid batteries carried within the hull. 



LIFE SUPPORT: Relies upon air entrapped in hull when hatch is closed. Snorkel for surface operations. 



VIEWING: Plastic dome (24-in. diam.) on conning tower provides 360 of viewing. Viewport in bow 2 in. thick, 16-in. diam. 



OPERATING/SCIENTIFIC EQUIPMENT: UQC, depth gage. 



MANIPULATORS: None. 



SAFETY FEATURES: Droppable weight (190 lb). MBT's and VBT can be blown dry at operational depth. Pressure hull can be flooded for 



emergency egress. 



SURFACE SUPPORT: SOO. 



OWNER: Various. 



BUILDER: G.W. Kittredge, Warren, Maine. 



REMARKS: Six of these vehicles were completed by 1 971 and six more were under construction at that time. Also designated as the VAST MK III. 



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