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fighting ships of the world

IMPERIAL JAPANESE NAVY (JAPAN)

SUBMARINES

"Kaidai 7" attack submarines (1942-1943)

I176 1943

Name No Yard No Builder Laid down Launched Comp Fate
176 <I176> (ex-76 <I76>)     Kure K K 6/1940 7/6/1941 8/1942 sunk 16/5/1944
177 <I177> (ex-77 <I77>)     Kawasaki, Kobe 3/1941 20/12/1941 12/1942 sunk 3/10/1944
178 <I178> (ex-78 <I78>)     Mitsubishi, Kobe 5/1941 24/2/1942 12/1942 sunk 29/5/1943
179 <I179> (ex-79 <I79>)     Kawasaki, Kobe 8/1941 16/7/1942 6/1943 foundered 14/7/1943
180 <I180> (ex-80 <I80>)     Yokosuka K K 4/1941 7/2/1942 1/1943 sunk 26/4/1944
181 <I181> (ex-81 <I81>)     Kure K K 11/1941 2/5/1942 5/1943 sunk 16/1/1944
182 <I182> (ex-82 <I82>)     Yokosuka K K 11/1941 30/5/1942 5/1943 sunk 1/9/1943
183 <I183> (ex-83 <I83>)     Kawasaki, Kobe 12/1941 21/1/1943 10/1943 sunk 28/4/1944
184 <I184> (ex-84 <I84>)     Yokosuka K K 4/1942 12/12/1942 10/1943 sunk 19/6/1944
185 <I185> (ex-85 <I85>)     Yokosuka K K 2/1942 16/9/1942 9/1943 sunk 22/6/1944

  

Displacement standard, t

1630

Displacement normal, t

1833 / 2602

Length, m

98.6 pp 102.6 wl 105.5 oa

Breadth, m

8.25

Draught, m

4.60

No of shafts

2

Machinery

2 Kampon diesels / 2 electric motors

Power, h. p.

8000 / 1800

Max speed, kts

23.1 / 8

Fuel, t

diesel oil 135

Endurance, nm(kts) 8000(16) / 50(5)
Armament

I176 - 178, 180 - 185: 1 x 1 - 120/45 11-shiki, 1 x 2 - 25/60 96-shiki, 6 - 533 TT (bow, 12)

I179: 1 x 1 - 120/45 11-shiki, 2 x 2 - 25/60 96-shiki, 6 - 533 TT (bow, 12)

Sensors 93-shiki sonar, 93-shiki hydrophone

Complement

88

Diving depth operational, m

80

Ship project history: Kaidai 7 (Large Admiralty 7) type. Built under 4th Supplementary programme of 1939. Design was created on the basis of Kaidai 6 type with entering of minor alterations. Engine power and endurance are a little lowered, all TTs are arranged in a fore end. Under the design it supposed to limit artillery to 2 twin 25mm MGs, however during building designers returned to usual 120mm/45 guns. Double-hulled, endurance was 75 days.

The 1942 programme assumed building of 10 more submarine of this type (Nos I-X), but order was not been given out.

Modernizations: 1942 - 1943, I176, 177, 181: were converted to transport submarines; - 1 x 1 - 120/45, torpedoes stowage was decreased; + 1 14m Daihatsu-type landing craft and deck cargo.

1943-1944, some survived: + 2-shiki 2-go radar

Naval service: I178 was sunk 8/5/1943 W off Espirito Santo by US submarine chaser SC669. I179 was foundered 14/7/1943 during training diving in Internal Sea of Japan, salvaged in 1957 and used for tests. I182 was lost after 22/8/1943 (presumably sunk 1/9/1943 off Espirito Santo by US destroyer Wadsworth). I181 was sunk 16/1/1944 off New Guinea by US ships. I180 was sunk 26/4/1944 SW off Kadiak (Aleuts) by US escort destroyer Gilmore. I183 was sunk off Shikoku 29/4/1944 by US submarine Pogy. I176 was sunk 16/5/1944 between New Guinea and Buka Islands by US destroyers Franks, Haggard and Johnston. I184 was sunk 19/6/1944 SE off Guam by US carrier aircraft. I185 was sunk 22/6/1944 NE off Saipan by US destroyers Newcomb and Chandler. I177 was sunk 3/10/1944 on approaches to Palau by US escort destroyer Samuel S. Miles.

I176 1942

 

Ivan Gogin, 2008-14