Would it be possible to enable collisions (and perhaps ramming) in Command?
I suppose an easy way to do it would be that, whenever ships are within a certain distance of each other (100 yards?), there is a random chance (10%?) of a collision, and both vessels take a certain amount of damage. This obviously favors big ships...5 DP isn't much to a destroyer, but it's a lot to a fishing boat! This could obviously be tweaked for greater detail. Might add a few interesting twists to some scenarios.
Anyway, just a thought...
(Side note...this might also be used as a way to add "monsters"...a large animal, like Godzilla or a giant octopus, would "collide" with a target to damage it...of course, the model would need some tweaking, since the monster would colliding the hard/sharp parts of his body (claws, teeth, etc.) with softer and more vulnerable parts of his prey.)