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Cha-246 or No. 246 (Japanese: 第二百四十六號驅潜特務艇) was a No.1-class auxiliary submarine chaser of the Imperial Japanese Navy that served during World War II.
| History | |
|---|---|
 Imperial Japanese Navy | |
| Name | Cha-246 |
| Builder | Yamanishi Shipbuilding Co., Ltd.[1] Ishinomaki |
| Laid down | 30 August 1944 |
| Launched | 8 October 1944 |
| Completed | 22 January 1945 |
| Commissioned | 22 January 1945 |
| Decommissioned | 30 December 1945 |
| Homeport | Sasebo |
| Fate | transferred to Japan Maritime Safety Agency, 1 January 1948 |
| History | |
 Japan Maritime Safety Agency | |
| Name | MS-05 |
| Acquired | 1 January 1948 |
| Renamed | Yamabato, 1 December 1951 |
| Homeport | Sasebo |
| Fate | transferred to Japan Maritime Self-Defense Force, 1 September 1954 |
| History | |
 Japan Maritime Self-Defense Force | |
| Name | Yamabato |
| Acquired | 1 July 1954 |
| Decommissioned | 1 June 1958 |
| Homeport | Osaka |
| Fate | unknown |
| General characteristics | |
| Class and type | No.1-class Submarine chaser |
| Displacement | 130 long tons (132 t) standard[1] |
| Length | 29.20 m (95 ft 10 in) overall |
| Beam | 5.65 m (18 ft 6 in) |
| Draught | 1.97 m (6 ft 6 in) |
| Propulsion |
|
| Speed | 11.0 knots (12.7 mph; 20.4 km/h) |
| Range | 1,000 nmi (1,900 km) at 10.0 kn (11.5 mph; 18.5 km/h) |
| Complement | 32 |
| Armament |
|
She was laid down on 30 August 1944 at the Ishinomaki shipyard of Yamanishi Shipbuilding Co., Ltd. (jp:ヤマニシ) and launched on 8 October 1944.[1][2][3] She was fitted with armaments at the Kure Naval Arsenal; completed and commissioned on 22 January 1945; and assigned to the Osaka Guard Force, First Fleet.[2] On 15 June 1945, she was assigned to the Sasebo Guard Force, Shimonoseki Defense Team, Seventh Fleet.[2] She survived the war.[2] On 30 December 1945, she was demobilized and assigned to mine-sweeping duties by the occupying forces.[2]
On 1 January 1948, she was assigned to the Japan Maritime Safety Agency as a minesweeper and designated MS-05 on 1 May 1948.[2] On 1 December 1951, she was renamed Yamabato (まばと) and served during the Korean War.[2] On 1 July 1954, she was transferred to the newly created Japan Maritime Self-Defense Force.[2] On 1 April 1956, she was designated Special Affairs Boat No.2 (MS-05) and on 31 March 1957, as Special Agent Boat No. 6 (YAS-06).[2] She was delisted on 1 June 1958.[2]
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