Here is a tip.
In late November 1939, the HMS Nelson and the HMS King George III will be in Loch Ewe. The Nelson sitting just outside the docks, and the King George docked. If you can sink them and escape, dock at Wilhemshaven, and go back on patrol
before December 24, 1939, both ships will be docked
again at Loch Ewe in the same identical places.
http://www.subsim.com/radioroom/show...light=Loch+Ewe