Simply to make sure that sight lines are maintained, we can't do some sort of a bezier curve approximation. The ship has to pass through every hex it normally would, and none that it wouldn't.
That said, the assumption is that we'll see the ship "bank" though the path, maintaining the heading (i.e. bow of the ship) in the direction of travel, and slide left or right as it continues along the path. Heading isn't important when moving for the ship, so I expect this is what is being worked on.
