been working hard on the ship's AI....they no longer 'follow' you like a lost puppy dog. If they detected you and then lost that detection they enter into a spiral search pattern for 1 hr looking for you. If they don't acquire you in that hour then they return to following waypoints.
Convoys are MUCH harder now. Depending on the number of escorts they will send one or two 'scouts' to come investigate if they detect you on the surface. If you submerge then (based on the number of escorts) they send a DC party over to DC the crap out of you. Also (depending on the number of escrorts) this DC party has a 'director' that sits about 1500m away from you 'directing' the DC party to your location for their DC attacks. When they DC you it's bad - they come right over you like they did in SH3
