[GT182]

I get in front of a convoy and come to a complete stop or at 2knots and Silent running, and wait for the escorts to pass by. Or I nail them if they're close to the convoy before they pass. Then I head right for the convoy center and start sinking shipping. The escorts that are left have a harder time finding you by doing that.. but they will find you. In SH5 it seems they can find you even over the noise made by the cargo ships.

In SH3 you could actually hide under and cargo ship and not be spotted. Same with the thermal layers.... they'd hide you if you went deep enough.