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  Oogata Unkato (Large Type Cargo Transporting Tube) Gneisenau Point
IJN
Oogata Unkato

544 Tons
41.3m / 4.9m


Click For Enlargement
Rainsford Feb 24, 1944

Click For Enlargement
Rainsford Feb 24, 1944
Sub History
Delivered to the Imperial Japanese Navy (IJN) as Oogata Unkato No. 1 (Large Type Cargo Transporting Tube) and towed from Japan via Truk to Rabaul then used for a supply mission to the north coast of New Guinea.

Wartime History
On December 24, 1943 after daybreak, PT Boats PT-152 and PT-191 spotted what they believed was was a large barge or submarine being towed by a barge towards the beach at Gneisenau Point on the north coast of New Guinea and attacked with gunfire. During a lull in the action, they heard a hissing sound of escaping compressed air and observed it to settle by the bow in shallow water with the stern towards shore. During the engagement, the PT Boats experience no return fire.

Wreckage
During January 1944, the wreckage was investigated by Major Throsby, and Lt. George Vanderbilt, intelligence officer from MTB Squadron 12 examined and photographed the wreckage lying heeled over on its side sunk in 8' of water and determined it was a cargo submersible.

References
At Close Quarters (1962) pages 216-217 (December 24, 1943)

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Last Updated
December 16, 2025

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