Opening the outer doors before firing is a nobrainer. The seconds it take for the doors to open automticaly makes the difference between hit or miss.
In addition to anything i may have written here:
http://www.subsim.com/radioroom/showthread.php?t=94111
- mark all contacts on your map, even if their out of range to give chase. You'll be able to better see/deduce where ship traffic routes are, and alter your patrol route accordingily.
-Mid to late war. Shoot your fish, go to 1/3rd and start clawing for the depths IMMEDIATLY. Any faster then 1/3rd your liable to tip them off. If you dont start diving right away, you might not get enough depth between you and that ashcan spewing DE.
- Always sweep the area and sky with the observation scope before surfacing. Partiucarlly if 1943 onward, or somewere along the US east coast, carribean, or freetown. Nothing quite like surfacing infront of a PBY or sunderland, - and yes, your "timing" can be THAT ROTTEN. Its happend to me at least twice. Hydrophone check coulnd't hurt either if the area is well patroled.
- Shallow water and rough weather is a bad combination if you value your hull integrity.
- That unarmed, or damaged merchant your using for deck gun target practice alerts everyone in the neighborhood for you.
- Avoid using electric torpedo's beyond 2000 meters if you can help it. Particuarlly against any target moving faster then 9 kts.
Thats all i have for now. Im sure theres more but i cant think of em right now.