HAKUYO 



LENGTH: 4.7 m 



BEAM: 1.7 m 



HEIGHT: 2.0m 



DRAFT: 1 .9 m 



WEIGHT (DRY): 6 tons 



OPERATING DEPTH: 300 m 



COLLAPSE DEPTH: 450 m 



LAUNCH DATE: 1971 



HATCH DIAMETER: 62 cm 



LIFE SUPPORT (MAX): 144 man-hr 



TOTAL POWER: 14.4 kwh 



SPEED (KNOTS): CRUISE 1 /5 hr 



MAX 3/5 hr 



CREW; PILOTS 1 



OBSERVERS 3 



PAYLOAD; NA 



PRESSURE HULL: Cylindrical shape of quenched and tempered, high tensile NS46 (Japan Defense Agency Standard) steel. Hull is 1 .4 m in. diam. 



and cylinder is 1 2.5 mm thick, endcaps are 1 3.5 mm thick. 



BALLAST/BUOYANCY: Vehicle is made negatively buoyant by letting seawater into the auxiliary tank and pumping out to become positive. A 



negative tank is used to obtain greater negative buoyancy when sitting on the bottom. 



PROPULSION/CONTROL; A stern-mounted propeller (trainable 90 left or right) provides main fore/aft propulsion and is driven by a 10-hp 



motor. A horizontal thruster, driven by a 1-hp motor is mounted on the bow and 0.5-hp vertical thrusters (1 each) are mounted on bow and stern. 



Diving planes are mounted on the bow to provide underway vertical control. 



TRIM; A lead weight is moved along a rail at the bottom and inside the pressure hull by a hydraulic motor. Up/down bow angles of 10° are 



obtainable. 



POWER SOURCE: Two lead-acid battery systems are carried in a ring-stiffened cylindrical shell (battery pod) beneath the pressure hull. A 120-V 



system supplies power to all propulsion units, hydraulic pump and lights. A 24-V system powers acoustic equipments, compass and indicators. 



LIFE SUPPORT A high-pressure flask mounted outside the pressure hull carries the O2 supply. Baralyme is used to absorb COj, silica gel is used to 



reduce humidity. A Drager gas analyzer is used to monitor the interior atmosphere. 



VIEWING; E ight viewports are incorporated into the forward endcap, six are arranged around the conning tower. A 90° view is obtainable through 



the viewports which have an I D of 1 50 mm. 



OPERATING/SCIENTIFIC EQUIPMENT: UQC (9-kHz), obstacle avoidance sonar, up/down echo sounders, radio, pinger, transponder. 

 MANIPULATORS: One manipulator capable of five degrees of freedom. 



SAFETY FEATURES: Auxiliary and negative buoyancy tanks can be blown in an emergency. Battery pod of 250 kg is droppable. Manipulator 

 wrist detaches when its applied load exceeds 50 kg. Emergency breathing apparatus is carried in the pressure hull which draws off of the main air 

 supply. Fire extinguisher, flashing surface lights. 



SURFACE SUPPORT: SOO. 

 OWNER: Ocean Systems Japan Ltd., Tokyo. 

 BUILDER: Kawasaki Heavy Industries, Ltd., Tokyo. 

 REMARKS; Operational. 



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