Japanese submarine Ha-102
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 Ha-102 (center) with Ha-101 (left) and Ha-104 (right) at Yokosuka, Japan, in 1945. Three midget submarines are in the foreground. | |
| History | |
|---|---|
 Japan | |
| Name | Small Supply Submarine No. 4601 |
| Builder | Kawasaki, Senshu and Kobe, Japan |
| Laid down | 8 June 1944 |
| Launched | 22 August 1944 |
| Renamed | Ha-102 on 22 August 1944 |
| Completed | 6 December 1944 |
| Commissioned | 6 December 1944 |
| Fate |
|
| General characteristics | |
| Type | Transport submarine |
| Displacement |
|
| Length | 44.5 m (146 ft 0 in) |
| Beam | 6.1 m (20 ft 0 in) |
| Draft | 4.04 m (13 ft 3 in) |
| Installed power |
|
| Propulsion |
|
| Speed |
|
| Range |
|
| Test depth | 100 meters (328 ft) |
| Capacity | 60 metric tons (59 long tons) |
| Complement | 22 |
| Armament | 1 × single 25 mm (1 in) Type 96 anti-aircraft gun |
Ha-102 was an Imperial Japanese Navy Ha-101-class submarine. Completed and commissioned in December 1944, she served during the final months of World War II, making two supply runs. She surrendered at the end of the war in September 1945 and was disposed of in October 1945.
The Ha-101-class submarines were designed as small, cheap transport submarines to resupply isolated island garrisons. They displaced 436 metric tons (429 long tons) surfaced and 501 metric tons (493 long tons) submerged. The submarines were 44.5 meters (146 ft 0 in) long, had a beam of 6.1 meters (20 ft 0 in) and a draft of 4.04 meters (13 ft 3 in). They were designed to carry 60 metric tons (59 long tons) of cargo.[1]
For surface running, the boats were powered by a single 400-brake-horsepower (298 kW) diesel engine that drove one propeller shaft. When submerged the propeller was driven by a 140-horsepower (104 kW) electric motor. They could reach 10 knots (19 km/h; 12 mph) on the surface and 5 knots (9.3 km/h; 5.8 mph) underwater.[2] On the surface, the Ha-101s had a range of 3,000 nautical miles (5,600 km; 3,500 mi) at 10 knots (19 km/h; 12 mph); submerged, they had a range of 46 nmi (85 km; 53 mi) at 2.3 knots (4.3 km/h; 2.6 mph). The boats were armed a single mount for a 25 mm (1 in) Type 96 anti-aircraft gun.[3]
Construction and commissioning
Ha-102 was laid down on 8 June 1944 by Mitsubishi at Kobe, Japan, as Small Supply Submarine No. 4602.[4] She was launched on 22 August 1944 and was named Ha-102 that day.[4] She subsequently was towed to the Kawasaki shipyard at Kobe for fitting-out.[4] She was completed and commissioned at Kobe on 6 December 1944.[4]
