Here's a handful of links that should come in handy as you're progressing through the world of unrestricted submarine warfare, mate.
-)
Submarine Torpedo Fire Control Manual (USN, 1952):
http://www.hnsa.org/doc/attack/index.htm
--)
The Submarine Commander's Handbook (
Kriegsmarine, 1942/43):
http://www.hnsa.org/doc/uboat/index.htm
-) USN War Patrol Reports:
http://www.hnsa.org/doc/subreports.htm
-) Recordings made aboard USS
Sealion in 1944:
http://hnsa.org/sound/#sealion
-) The main link for documents at the Historic Naval Ships Association:
http://www.hnsa.org/doc/
--)
History of U-Boat Policy, 1939-1945 (Admiralty, 1946):
http://www.uboatarchive.net/U-boatPolicy.htm
--) Admiralty records at U-Boat Archive, including interrogation reports
http://www.uboatarchive.net/BritishReports.htm
--)
Kriegsmarine War Diaries/KTBs:
http://www.uboatarchive.net/KTBList.htm
http://www.uboatarchive.net/BDUKTB.htm
--) U-Boat Archive
http://www.uboatarchive.net/
SH3/4's particular quirks aren't considered of course, but some good reads there, and a lot of the information will become invaluable
