I do try to lay in wait of the convoy as much as I can, but I have one nasty habit.
From sighting to sinking, I never lower the scope (this causes me to sometimes leave the scope up while cruising so I go flank speed for 1000 m and find out the scope is still up

).
I have stopped playing with TMO, but I just realized how much I love that mod, so I'm going to play with TMO and the 1.4 version of RSRDC.
Also, does anyone know any links to good sites that deal with WW2 sub tactics?