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fighting ships of the world

IMPERIAL JAPANESE NAVY (JAPAN)

SUBMARINES

"Otsu-gata B1" cruiser submarines (1940-1943)

I35 1942

I35 1943

Name No Yard No Builder Laid down Launched Comp Fate
15 <I15>     Kure K K 1/1938 7/3/1939 9/1940 sunk 10/11/1942
17 <I17>     Yokosuka K K 4/1938 19/7/1939 1/1941 sunk 19/8/1943
19 <I19>     Mitsubishi, Kobe 3/1938 16/9/1939 4/1941 sunk 25/11/1943
21 <I21>     Kawasaki, Kobe 1/1939 24/2/1940 7/1941 sunk 29/11/1943
23 <I23>     Yokosuka K K 1/1939 24/11/1939 9/1941 sunk 18/2/1942
25 <I25>     Mitsubishi, Kobe 2/1939 8/6/1940 10/1941 sunk 3/9/1943
26 <I26>     Kure K K 7/1939 10/4/1940 11/1941 sunk 24/10/1944
27 <I27>     Sasebo K K 7/1939 6/6/1940 2/1942 sunk 12/2/1944
28 <I28>     Mitsubishi, Kobe 9/1939 18/12/1940 2/1942 sunk 17/5/1942
29 <I29>     Yokosuka K K 9/1939 29/9/1940 2/1942 sunk 26/7/1944
30 <I30>     Kure K K 6/1939 17/9/1940 2/1942 sunk 13/10/1942
31 <I31>     Yokosuka K K 12/1939 13/3/1941 5/1942 sunk 13/6/1943
32 <I32>     Sasebo K K 1/1940 17/12/1940 4/1942 sunk 24/3/1944
33 <I33>     Mitsubishi, Kobe 2/1940 1/5/1941 6/1942 wrecked 13/6/1944
34 <I34>     Sasebo K K 1/1941 24/9/1941 8/1942 sunk 13/11/1943
35 <I35>     Mitsubishi, Kobe 9/1940 24/9/1941 8/1942 sunk 22/11/1943
36 <I36>     Yokosuka K K 12/1940 1/11/1941 9/1942 surrendered 8/1945, scuttled 1/4/1946
37 <I37>     Kure K K 12/1940 22/10/1941 3/1943 sunk 19/11/1944
38 <I38>     Sasebo K K 6/1941 15/4/1942 1/1943 sunk 12/11/1944
39 <I39>     Sasebo K K 6/1941 15/4/1942 4/1943 sunk 26/11/1943

  

Displacement standard, t

2198

Displacement normal, t

2589 / 3654

Length, m

102.4 pp 106.9 wl 108.7 oa

Breadth, m

9.30

Draught, m

5.14

No of shafts

2

Machinery

2 Kampon diesels / 2 electric motors

Power, h. p.

12400 / 2000

Max speed, kts

23.6 / 8

Fuel, t

diesel oil 220

Endurance, nm(kts) 14000(16) / 96(3)
Armament

most: 1 x 1 - 140/40 11-shiki, 1 x 2 - 25/60 96-shiki, 6 - 533 TT (bow,17), 1 catapult, 1 seaplane (E14Y1)

some: 2 x 1 - 140/40 11-shiki, 1 x 2 - 25/60 96-shiki, 6 - 533 TT (bow, 17)

Sensors 93-shiki sonar, 93-shiki hydrophone

Complement

101

Diving depth operational, m

100

Ship project history: Otsu-Gata B1 type. Built under 3rd and 4th Supplementary programmes of 1937 and 1939. As design basis Kaidal 6b submarine was used with aviation armament as on Ko-Gata A1 type. Submarines of new "Model B" type (Otsu-Gata) differed from predecessors by more streamlined forms of hull and "CT-hangar" complex. Since Otsu-Gata there was an actual confluence of cruiser and fleet submarines development lines, as these boats intended both for long-range reconnaissance and for actions together with the surface forces. Double-hulled, endurance was about 90 days.

I17 differed from sisterships, that the hangar and a catapult placed aft from CT (accordingly 140mm gun was fitted fwd).

Part of submarines was completed under changed design: second 140mm gun fwd from CT was installed instead of hangar and catapult.

Modernizations: 1943-44, some survived: + 2-shiki 2-go radar

Autumn 1944, I36, 37: - 1 x 1 - 140/40, 1 seaplane, 1 catapult and hangar; + 1 x 2 - 25/60 96-shiki, 4 Kaiten human torpedoes

late 1944, I36: + 2 Kaiten human torpedoes

Naval service: I23 after 15/2/1942 was lost S off Oahu (Hawaii), possibly she was sunk by US aircraft 26/2/1942. I28 17/5/1942 was sunk at Truck by US submarine Tautog. I30 13/10/1942 on approaches to Singapore was stricken by British mine and sunk, subsequently she was salvaged and broken up. I15 was sunk 10/11/1942 N off San Christobal by US destroyer-minesweeper Southard (under other data, she was sunk 2/11/1942 in the same place by US destroyer McCalla). I31 after 13/5/1943 was lost, possibly she was sunk 13/6/1943 N off Kiska by US destroyer Frazier. I17 was sunk 19/8/1943 SE off New Caledonia by New Zealand corvette Tui and US aircraft. I25 after 24/8/1943 was lost, under miscellaneous versions, she was mined at Espirito Santo in early September, 1943, or sunk NE off Espirito Santo 3/9/1943 by US destroyer Ellett. I34 was sunk 13/11/1943 at Penang by British submarine Taurus. I35 was sunk 22/11/1943 at Tarawa by US destroyers Meade and Frazier. I19 was sunk 25/11/1943 off Gilbert Islands by US destroyer Radford. I21 after 27/11/1943 was lost, possibly sunk 29/11/1943 at Tarawa by US carrier aircraft. I39 after 3/12/1943 was lost, presumably sunk 23/12/1943 by US escort destroyer Griswold in Solomons area. I27 was sunk 12/2/1944 NW off Addu (Maldives) by British destroyers Petard and Paladin. I32 was sunk 24/3/1944 in Marshall Islands area by US destroyers Halsey Powell, Hull, escort destroyer Manlove and patrol craft ΠΡ1135. I33 was foundered 26/9/1942 at Truck on shallow water as result of accident during after repair trials, salvaged 29/12/1942 and was under repair till May, 1944, she was foundered again on shallow water, having received a breach as a result of navigating accident 13/6/1944 during gears tests off Kure, secondary raised in July, 1953 and handed over on demolition. I29 was sunk 26/6/1944 at Philippines by US submarine Sawfish. I26 was sunk 24/10/1944 at Samar by US escort destroyer Coolbaugh (by other version, sunk 28/10/1944 NE off Surigao Straits by US destroyers Gridley and Helm). I38 was sunk 12/11/1944 in Carolina Islands area by US destroyer Nicholas. I37 was damaged 27/4/1944 S off Penang by British mine, repair and conversion to Kaiten carrier lasted till beginning of autumn 1944, she was sunk 19/11/1944 at Palau by US escort destroyers Conklin and McCoy Reynolds. I36 was scuttled by Americans 1/4/1946.

I15 1940

 

© Ivan Gogin, 2008-14