My thinking was that once torp's started going off in the middle of a convoy at night that the convoy would start firing off ilumination rounds into the air and using spot lights to sweep the area so it would'nt make since to me to stay on the surface unless you wanted to be detected.
Now I know the star clusters are RL and not in game so you don't have to worry about those so much (would be cool if they could be modded) but if you use GW as I do I do know they use spotlights to sweep back and forth and if you are unfortunate enough to get caught in a beam your busted!
Just my 2
K
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