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KS Class, Japanese Submarines


Photograph of KS class submarine

CombinedFleet.com. Fair use may apply.


Specifications:


Tonnage 525 tons standar
601 tons surfaced
782 tons submerged
Dimensions 194'4" by 19'8" by 11'6"
59.23m by 5.99m by 3.51m
Maximum speed       14.2 knots surfaced
8 knots submerged
Dive To 245 feet (75 m)
Complement 38
Armament 4 21" torpedo tubes (8 torpedoes)
1 3"/40 AA gun
Machinery
2-shaft diesel (1100 shp) or electric (760 shp)
Range 3500 nautical miles (6500 km) at 12 knots surfaced
60 miles (110 km) at 3 knots submerged

The Kaigun sho (Kaisho) or KSs were short-ranged (RO) submarines just coming to completion when war broke out. They had partially double hulls of riveted medium steel. They were intended for defense of small island bases.

A patrol line of these boats was rolled up in 1944 in a single brilliant operation by destroyer escort England. What could not be disclosed until decades later was that England was guided to their location by Ultra intelligence.


Units in the Pacific:

Ro-100

Completed 1942-9-23 (Kure)      

Sunk by aircraft or mine 1943-11-25 off Omai

Ro-101      

Completed 1942-10-31 (Kawasaki-Kobe)      

Sunk 1943-9-15 off San Cristobal Island by Saufley
Ro-102 Completed 1942-11-17 (Kawasaki-Kobe)       Sunk 1943-5-14 off Vitiaz Strait (147.5E 6.9S) by PT-150 and PT-152
Ro-103 Completed 1942-10-21 (Kure)       Missing from 1943-7-28 off Vanganu
Ro-104 Completed 1943-2-25 (Kawasaki-Kobe)       Sunk 1944-5-23 off Kavieng by England
Ro-105 Completed 1943-3-5 (Kawasaki-Kobe)       Sunk 1944-5-31 off Kavieng by England
Ro-106 Completed 1942-12-26 (Kure)       Sunk 1944-5-22 off Kavieng by England
Ro-107 Completed 1942-12-26 (Kure)       Sunk 1943-7-12 off Kolombangara by Taylor
Ro-108 Completed 1943-4-20 (Kawasaki-Kobe)       Sunk 1944-5-26 off Manus by England
Ro-109 Completed 1943-4-30 (Kawasaki-Kobe)       Sunk 1945-5-29 off Okinawa by aircraft from Tulagi
Ro-110 Completed 1943-7-10 (Kawasaki-Kobe)       Sunk 1944-2-11 near 83.3E 17.5N by JumnaIpswich, and Launceston
Ro-111 Completed 1943-7-20 (Kawasaki-Kobe)       Sunk 1944-6-10 off Kavieng by Taylor
Ro-112 Completed 1943-9-12 (Kawasaki-Kobe)       Torpedoed 1945-2-11 off Camiguin by Batfish
Ro-113 Completed 1943-10-15 (Kawasaki-Kobe)       Torpedoed 1945-2-11 off Babuyah by Batfish
Ro-114 Completed 1943-11-25 (Kawasaki-Kobe)       Sunk 1944-6-17 off Tinian by Melvin and Wadleigh
Ro-115 Completed 1943-11-25 (Kawasaki-Kobe)       Sunk 1945-2-31 off Manila by Jenkins, O'Bannon, Bell, and Ulvert M. Moore
Ro-116 Completed 1944-1-31 (Kawasaki-Kobe)       Sunk 1944-5-24 off Kavieng by England
Ro-117 Completed 1944-1-31 (Kawasaki-Kobe)       Sunk by aircraft 1944-6-17 off Saipan


References

Boyd and Yoshida (1995)

Carpenter and Polmar (1986)

Jentschura, Jung, and Mickel (1977)

Materials of IJN (accessed 2009-12-18)

U.S. Naval Technical Mission to Japan (1946-1-11; accessed 2012-2-20)

Worth (2001)



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