SURCOUF: THE MYSTERY SUB OF WWII
1 x 60
Surcouf (NN3) was a French submarine ordered to be built in December 1927, launched on 18 October 1929, and commissioned in May 1934. Surcouf—named after the French privateer Robert Surcouf—was the largest submarine ever built until surpassed by the Japanese I-400s. Her short wartime career was marked with controversy and conspiracy theories.
Like so much else about Surcouf, there are alternate stories of her end. Disregarding the predictable ones about her being swallowed by the Bermuda Triangle, one of the most popular is that she was caught in Long Island Sound refueling a German U-boat, and both submarines were sunk, either by the American submarines USS Mackerel and Marlin, or a United States Coast Guard blimp.