I'm not sure I agree about the surface-versus-submerged resistance. Yes, surfaced there is less area interacting with the water, but the problems of surface tension and wave resistance are immense, especially surfaced wave resistance. The hull creates waves of it's own as it moves through the water, and these waves become hills the boat literally has to climb, which costs both speed and fuel.
I almost always cruise at 1/3 speed, unless it's critical in which case I make my way home at Ahead Slow. Blackness, I'll try running at six knots and see what happens.
mike_espo: U-14's getting a little crowded with two captains...or is it three now?
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