I54 1944
| Name | No | Yard No | Builder | Laid down | Launched | Comp | Fate |
| 伊54 [I54] | Yokosuka K K | 7/1942 | 4.5.1943 | 3.1944 | sunk 28.10.1944 | ||
| 伊56 [I56] | Yokosuka K K | 9/1942 | 30.6.1943 | 6.1944 | sunk 18.4.1945 | ||
| 伊58 [I58] | Yokosuka K K | 12/1942 | 9.10.1943 | 9.1944 | surrendered 8.1945, scuttled 1.4.1946 |
|
Displacement standard, t |
2140 |
|
Displacement normal, t |
2607 / 3688 |
|
Length, m |
102.4 pp 106.9 wl 108.7 oa |
|
Breadth, m |
9.30 |
|
Draught, m |
5.19 |
|
No of shafts |
2 |
|
Machinery |
2 Kampon diesels / 2 electric motors |
|
Power, h. p. |
4700 / 1200 |
|
Max speed, kts |
17.7 / 6.5 |
|
Fuel, t |
diesel oil 242 |
| Endurance, nm(kts) | 21000(16) / 105(3) |
| Armament |
1 x 1 - 140/40 11-shiki, 1 x 2 - 25/60 96-shiki, 6 - 533 TT (bow,19), 1 catapult, 1 seaplane (E14Y1) |
|
Electronic equipment |
2-shiki 2-go radar, 93-shiki sonar, 93-shiki hydrophone, E27 ECM suite |
|
Complement |
101 |
| Diving depth operational, m | 100 |
Project history: Otsu-Gata B3 type. Built under the 1941 War programme. Repeated Otsu-Gata B1 type, differing only by decreased engine power: that allowed to raise an endurance significantly. Number of spare torpedoes has slightly increased. Under the same programme building of 4 more submarines (I62, 64-66) was provided, but in 1943 order was cancelled. 14 more submarines of the same class were planned to built under the 1942 additional programme (Nos 5101-5114), however works on them have not been begun. 5th Supplementary programme provided building of 18 submarines of B4 type (2800t surfaced, 22.4kts surfaced, 1x1-140/40, 1x2-25, 8-533TT(16), 8mines, 1seaplane) under numbers No5115-5132 but orders were cancelled in 1943.
Modernizations: late 1944, I56, 58: - 1 x 1 - 140/40, 1 catapult with hangar and seaplane; + 4 Kaiten human torpedoes.
1945, I56, 58: + 2 Kaiten human torpedoes
Naval service: I54 was sunk 24.10.1944 E off Surigao Straits by US escort destroyer Richard M. Rowell. I56 was sunk 18.4.1945 E off Okinawa by US carrier aircraft and destroyers Collett, Heermann, McCord, Mertz and Uhlmann. I58 was scuttled by Americans 1.4.1946.
I58
© Ivan Gogin, 2008-14