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Photo

I58  

Ships

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

Technical data

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

Standard scale images

Graphics

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.