DSV Shinkai

The Shinkai (しんかい) is a crewed research submersible that can dive up to a depth of 600 m. It was completed in 1970, and until 1981 it had the greatest depth range of any crewed research vehicle in Japan. The Shinkai is owned and run by the Japan Coast Guard and it is launched from the support vessel Otomemaru (乙女丸).

History
Japan
Name	Shinkai
Builder	Kawasaki Heavy Industries Kobe shipyard
Laid down	1968
Launched	1970
Sponsored by	Japan Coast Guard
Completed	1970
Acquired	1970
Commissioned	1970
Decommissioned	1977
Maiden voyage	1970
In service	1970
Out of service	1976
Status	Preserved at Kure Maritime Museum
General characteristics [1]
Type	Deep-submergence vehicle
Tonnage	100 tons (Dry weight)
Length	15.3 m (50 ft)
Beam	5.5 m (18 ft)
Draft	4.0 m (13.1 ft)
Installed power	50 100 v, 2,000 amp-hour, externally mounted lead-acid batteries
Propulsion	1 main 11 kW electric, 680—3,200 rpm, reversible for horizontal 2 port/starboard 2.2 kW electric, reversible, 360° rotating for vertical
Speed	1.5 knots (2.8 km/h; 1.7 mph) 10 hours 3.5 knots (6.5 km/h; 4.0 mph) 3 hours
Endurance	192 man hours maximum life support
Test depth	600 m (2,000 ft) 1,500 m (4,900 ft) (Collapse depth)
Complement	2 Pilots 2 Observers
Notes	Underwater telephone (UQC), radio, gyrocompass, speed indicator, depth gauge, echosounder, seismic profiling, obstacle avoidance sonar, transponder, stereo camera, TV, salinometer, water and bottom samplers, water temperature and light sensors, current meter, magnetic, gravity and sound speed measurements, and radiometer. One manipulator arm.

Rear view of Shinkai

Two 4.0 m (13.1 ft) diameter, 3.6 cm (1.4 in) thick high-strength low-alloy steel pressure hulls connected by a 1.45 m (4.8 ft) tunnel. Pilots and observers are housed in the forward hull with mechanical and power supplies in aft hull. A 1.7 m (5.6 ft) escape sphere was mounted on the forward hull. Access was through four 500 mm (20 in) hatches with one 600 mm (24 in) emergency escape hatch. Five view ports with 90° viewing angle in the forward sphere, three 120 mm (4.7 in) inside diameter for forward viewing and one 50 mm (2.0 in) inside diameter on each side.[1]