[Damo]

I was so tempted to put 'Be more aggressive!!' but I'll leave that to Jimbuna if he cares to step up...

11. Always scan a merchants deck for armament before a) opening fire with your deck gun and b) surfacing when there is a chance you may be spotted. Some ships have only a front or rear gun, so try and position yourself in his blind spot, i.e. an AOB of 0 or 180 and catch them waterline shots when he starts zig-zagging. Mirror his turns so he can't get gunsights on you though.

12. When you think the escorts have given up, wait longer.

13. If you spot an aircraft patrol, dive. If you can't, 9 times out of 10, your war is over (especially GWX...). If you're in a slow diver like a IX-C and the aircraft is already close, man the flak until the first pass, then crash dive, you may get a lucky shot.