THU 22 APR 1943
Submarine Grenadier (SS-210) is scuttled off Penang, Malaya, 06°30'N, 97°40'E, after having been damaged by Japanese plane (936th Kokutai) the previous day.
Submarine Stingray (SS-186) mines waters off Wenchow, China.
Dutch submarine O 21, despite presence of escort vessel, sinks Japanese army cargo ship Yamazato Maru in Malacca Straits, 03°28'N, 99°47'E.
Japanese aircraft bomb airfield at Funafuti, Ellice Islands.
PBYs (VP 84), flying from bases in Iceland and Greenland, drive off German U-boats threatening convoy HX 234.