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fighting ships of the world

IMPERIAL JAPANESE NAVY (JAPAN)

SUBMARINES

"Otsu-gata B3" cruiser submarines (1944)

I54 1944

Name No Builder Laid down Launched Comp Fate
54 <I54>   Yokosuka K K 7/1942 4/5/1943 3/1944 sunk 28/10/1944
56 <I56>   Yokosuka K K 9/1942 30/6/1943 6/1944 sunk 18/4/1945
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)

Sensors

13-go radar

Complement

101

Diving depth operational, m 100

Ship project history: Otsu-Gata B3 type. Built under the 1941 War program. 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 program 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 program (Nos 5101-5114), however works on them have not been begun. 5th Supplementary program 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 American escort destroyer Richard M. Rowell. I56 was sunk 18/4/1945 E off Okinawa by American carrier aircraft and destroyers Collett, Heermann, McCord, Mertz and Uhlmann. I58 was scuttled by Americans 1/4/1946.

I58

 

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Ivan Gogin, 2008-14