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Their actions secured the release of 299 British sailors.
Naval re-enactors can obtain legally deactivated firearms from suppliers and, with valid documentation, blank-firing examples can also be obtained for live action displays.
One of these is the Type IXC U534 which is preserved in Birkenhead, Liverpool.
German navy ratings sometimes turn up at events to depict prisoners of war; in fact, the first Germans taken prisoner came from U-Boats which had been sunk.