[propbeanie]

Several things to try. First of all, do not approach when the sea state is like a sheet of glass, if at all possible. Second, attack nose on or tail on, and turn as the escorts start by. In conjunction with that, try to stay out of their "cone". Third, find the thermal layer prior to the convoy's arrival, and approach from below that if possible, and come up as the escorts pass overhead. Do your shooting, and then get back below the thermal as you slink away to reload. It can sometimes work to do Ahead Flank while doing that, if you already have an escort headed your way. You might have to do a combination of 1, 2 & 3. Fourth, if it is night time, and dark enough (no moon, clouds, etc), and the mod allows it, try a surface approach / attack. They can't hear you if you're not below the surface. The same rules of your sub's profile still apply though...