Built 1940 | ||
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Name No. 31-class patrol boat Builders Kure Naval ArsenalSasebo Naval ArsenalHakodate Dock Corporation Subclasses No. 31 class (ex-Momi class)No. 46 class (ex-Wakatake class) |
The No. 31-class patrol boats (第三十一号型哨戒艇,, Dai Sanjūichi Gō-gata Shōkaitei) were a class of patrol boats of the Imperial Japanese Navy (IJN), serving during World War II. 9 vessels were converted from Momi-class destroyers and 1 vessel was converted from a Wakatake-class destroyer in 1940.
Contents
Background
In 1939, the IJN was liberated from London Naval Treaty, and they built many Kagerō-class destroyers. On the other hand, aging of the Momi-class destroyers was serious. Their boilers were worn down very much because they were destroyers. Some Momi-class destroyers were not able to show 30 knots speed. The Navy General Staff made the Confidential Document No. 456. It was an order to rebuild them into patrol boats - about four Minekaze-class destroyers and six Momi-class destroyers. The IJN chose nine Momi class and one Wakatake class. Three Momis and one Wakatake were increased, because two Minekazes were decreased.
Rebuilding
Service
No. 46 class
No. 40 to No. 45 were a space to the vessels numbers. These numbers were going to be given to all of Wakatakes.