Boy - seems like bad luck. I get shot at a lot and they rarely hit me. I'm surprised he landed one at 4000m. Often after I hit a convoy I'll surface to finish a wounded merchant and an escort will come screaming back to engage me. I'll wait till the rounds start landing near me before I dive and escape. I find it's rare to take a hit when you're facing away from them (narrow profile). Every now and again I take a hit, but even then, I've never had any serious damage from it - hull damage maybe. But never damage to systems. Come to think of it, I've never had my deisels knocked out. Kinda sad really - I always seem to die outright, or take no damage at all. I never get those close calls, or hairy damage situations.