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  HA-37 Type A Midget Submarine
Type A
Kō-hyōteki kō-gata

46 Tons (surfaced)
47 Tons (submerged)
78.5' x 6' x 10.2'
2 x Type 97 torpedo
140kg scuttling charge

Submarine History
Built by Karasukojima Naval Armory as the 37th Type A Midget Submarine completed. Delivered to the Imperial Japanese Navy (IJN) as HA-37 Type A Midget Submarine.

On November 13, 1942 Japanese submarine I-20 embarks this midget submarine and departs Truk bound for Guadalcanal. That same day returns to Truk because the midget submarine suffered a malfunction.

Sinking History
On November 19, 1942 at 3:00am Japanese submarine I-20 launches HA-37 roughly six miles off Cape Esperance on Guadalcanal. Aboard is commander Lt(jg) Miyoshi Yoshiaki with crew member PO1C Umeda Kiyoshi. A few minutes later, HA-37's steering system develops a serious oil leak but continues on the surface but fails to sight any targets. At 6:55am the damaged midget submarine was scuttled off Cape Esperance on Guadalcanal.

Fates of the Crew
Miyoshi and Umeda escape ashore and join Japanese forces on Guadalcanal.

This submarine might be Type A Midget Submarine (Cape Esperance 1945). On January 4, 1945 USCGC Ironwood (WLB-297) began salvaging this submarine from a depth of 30' off Cape Esperance on Guadalcanal. Divers, working from a small boat, use a hose and crowbars to clear a space under the bow and stern of the submarine. On January 9, 1945 a chain sling is rigged around the bow for salvage. The identity of this 1945 salvaged midget submarine is unknown but possibly HA-8, HA-22 or HA-37.

Combined Fleet - Midget Submarines in the Solomon Islands 1942

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Last Updated
November 19, 2021


November 19, 1942
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