Yep, I did some investigating too.
I did remeber it correct, so if you are traveling straight towards the stream with equal speed your speed will be 0 contra seafloor. Everybody can imagine what kind of affect the currents would have in your tactics.
For example, if you turn your heading in the stream after an attack, you'll get a big bonus to your speed, and in an hour you'll be 6 nm's off the point you lauched the torpedoes (if you are driving 3 knots and the speed of current is 3 knots also). So, DD's will be far away maybe, or not... If they can take this in account.
But anyway: More I think dynamic weather, celestical navig. and streams, more interested in I am. Navigation would not be a problem to a casual player, if the process is done by the navigator. (AI). There has been good ideas for the navig. system. Anyway I would like to get rid of the GPS-system.
-RC-