All Subs, All Pacific

MON 21 SEP 1942
Pacific
Submarine Grouper (SS-214) sinks Japanese army cargo ship Tone Maru in China Sea, east of Shanghai, 31°18'N, 123°27'E.

Submarine Trout (SS-202) sinks Japanese auxiliary netlayer Koei Maru south of Truk, 06°54'N, 151°51'E.