June 25, 1942, the Japanese destroyer Yamakaze was torpedoed and sunk by USS Nautilus (SS-168) about 60 nautical miles from the coast of Japan. Yamakaze had sunk USS Shark (SS-174) a few months earlier. This photo was taken through the periscope of the Nautilus.
Station HYPO 
27 June 2022 at 05:52
Communications intelligence played a huge role in the United States submarine action of the Pacific War. The role ComInt played in the Pacific Fleet’s submarine campaign remains to this day not fully appreciated.
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