At least some of these boats were later fitted with snorkels, and I-53 was also modified to carry six Kaiten. Seventeen further Type C3 units were cancelled, as were 25 units of a subsequent Type C4.
Bagnasco credits the Type C (C1, C2, and C3) submarines with sinking 16 merchant and auxiliary vessels for a total of 80,660 tons.
I-52 was lost to aircraft from USS BOGUE 800 miles southwest of the Azores while carrying rubber, gold, quinine, and Japanese engineers to German-occupied France, on 24 June 1944. I-53 survived the war, only to be scuttled off Goto Island in 1946. I-55 had been in commission only 3 months when destroyer escorts USS GILMER and the WILLIAM C. MILLER put an end to her off Saipan on 14 July, 1944.
Units | 3 (one survived) |
---|---|
Ships | I-52, I-53, I-55 |
Year(s) Completed | 1943-1944 |
Displacement | 2,564 tons / 3,644 tons |
Dimensions | 356.5 ft x 30.5 ft x 16.75 ft |
Machinery | 2 diesels: 4,700 hp
electric motors: 1,200 hp |
Speed | 17.75 knots / 6.5 knots |
Range | 21,000 nm @ 16 knots |
Armament | 6x533mm TT fwd + 2x14cm/50 cal. (19 torpedoes). |
Max. Depth | 100 m (330 feet) |
Crew | 94 officers and men |