The Tinosa Story The Silent Service : Season 2 Episode 19

Tinosa (Submarine, SS-283) Penetrating Tsushima Strait to get at shipping in the Sea of Japan was a job that fell to a few specially equipped submarines in the closing months of World War II. The USS Tinosa was sent into the Emperor's "private lake", the Tsushima Strait. The Strait was guarded by thick mine fields. However, with the help of "frequency modulated sonar," the Tinosa finally slipped by without damage and reaped her harvest, convoys of unprotected enemy ships.