Manualy set your TDC for a 90 degree shot, set Uzo to 80 degrees
Run on the surface, and side up to the convoy on a parallel course.
You'll see the ships long before they'll see you.. pick a target, and place it at about 600m (or closest range without being spotted), now running on a parallel course put the target on your 80 degree Uzo line of fire.
Match the ship speed, and enter this into the TDC.... fire when ready.
Once you've fired, move out away from the convoy at full tilt.. coming in again in about 30 minutes... repeat the procedure.
Keep your eyes peeled.. escorts have a nasty habit of appearing out of nowhere
