The U-550 was cruising off the east coast of the United States back on April 16, 1944, when it torpedoed the gasoline tanker SS Pan Pennsylvania. The Pennsylvania was headed to the UK with 140,000 barrels of gasoline, along with a protective convoy of three ships - the USS Joyce, USS Gandy and USS Peterson.

Although the U-boat attempted to evade detection by concealing itself under the sinking freighter, sailors on the USS Joyce managed to identify the German vessel and damage it by dr...
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