Oooops! Puts you pretty close to Derby House:
http://www.liverpoolmuseums.org.uk/m...derbyhouse.asp
But it didn't actually start operations until 1941, so you might be alright, otherwise, being close to there is probably not a great idea for a German submarine. You could always paint your sub yellow and pretend to be The Beatles, they did take a detour to Hamburg early in their career, so you'd have a good cover story.
:rotfl: