See also this: https://en.m.wikipedia.org/wiki/HMS_Petard_(G56)
And this: https://en.m.wikipedia.org/wiki/German_submarine_U-559
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See also this: https://en.m.wikipedia.org/wiki/HMS_Petard_(G56)
And this: https://en.m.wikipedia.org/wiki/German_submarine_U-559
