On April 23, 1945 patrol boat USS Eagle PE-56 was sunk by a torpedo fired from a German submarine, the U-853 just a few miles off the coast of Maine. Split in half by the blast, Eagle quickly sank to the seabed and most of her 62-strong crew lost their lives in the attack, save for a small group of survivors dubbed "the lucky 13."

Source: Doomed WWII warship reveals its secrets: How 'the lucky 13' survived the sinking of the USS Eagle