Gibraltar, hmph, AM36 I say, both those from Scapa and from Loch Ewe pass through there, and you can spend the downtime deckgunning merchies or lying on the bottom waiting for the planes to go away
it's fairly deep in some places, deep enough anyway, and not all that far from Bergen, Kiel and Willi
you could also try st. George's channel when sailing out of the French ports
</shallow water sailor mutterings>
