Generally speaking I find 8 knots to give the best fuel efficiency. I am currently attacking a convoy heading for Halifax about 500 kilometres off the Canadian coast in my type VIIB and have still got over half a tank of fuel left. Might use the Belchen supply ship stationed on the Greenland coast on the way back though.
Nemo
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"I'm afraid there is no disguising the fact that King's obsession with the Pacific and the Battle of Washington cost us dear in the Battle of the Atlantic".
Sir John Slessor GCB, DSO, MC, DL
AOC-in-C Coastal Command RAF
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