Scapa-Flow, penetrated 1939-1941, sunk three auxilary cruisers, one battlship, one carrier. (entered from the south, exited to the west)
Lock-Ewe, 1939-1941 one V&W destroyer, one Fiji light Cruiser, two T2 tankers, one battleship, many merchants. (one way in, one way out)
Bristol, 1939-1941, many merchants, many destroyers. (one way in, one way out)
Gibralter, 1940-1941, merchants and tankers. Oooo, lots of DD's!
Freeport, 1940-1942, merchants
Halifax is scary! So is Galvaston.
Other than that, haven't tried many others.
There is a good list here:
http://edseek.com/archives/2005/05/0...urvival-guide/
That tells you what is where and when to expect it.
For example:
Entry Exit Ship Location
From:1939 0915 To:1939 1010 Auxiliary Cruiser Scapa Flow
1939 1004 1939 1014 BB Revenge Scapa Flow
1939 1101 1940 0105 BB Nelson Loch Ewe
1939 1105 1939 1205 BB Revenge Loch Ewe
1940 0301 1940 0501 Auxiliary Cruiser Scapa Flow
1940 0307 1940 0425 CV Illustrious Scapa Flow
1940 0401 1940 0601 Auxiliary Cruiser Scapa Flow
1940 0517 1945 0101 CL Fiji Light Cruiser Loch Ewe
1940 0524 1940 0630 CL Dido Light Cruiser Scapa Flow
1940 1211 1940 1231 BB King George V Scapa Flow
1941 0201 1941 0217 Auxiliary Cruiser Scapa Flow
1941 0210 1941 0320 Auxiliary Cruiser Scapa Flow
1941 0315 1945 0430 CL Fiji Light Cruiser Scapa Flow
1942 0203 1942 0228 BB King George V Scapa Flow
1942 0215 1943 0903 CV Illustrious Loch Ewe
1942 0215 1943 0903 Passenger Liner Bristol
1942 0915 1943 0903 CVE Bogue Escort Loch Ewe
1943 0903 1944 0630 CVE Bogue Escort Norfolk
Hope this helps.
God Bless
Till all are one