No, they would have to do some interesting things to the density or viscosity of the water for the handling to be similar. Or they could operate at 25x the spee

No, they would have to do some interesting things to the density or viscosity of the water for the handling to be similar. Or they could operate at 25x the speed that they currently are, but that doesn't seem feasible. See http://en.wikipedia.org/wiki/Reynolds_number http://en.wikipedia.org/wiki/Reynolds_number