I like the idea. If it works you could make a complete navy battle mod. You could have the aircraft carrier (or simliar ships) when you start, then build construction type boats that build ship yards and stuff. Lots of smaller boats for assaulting the enemy, aircraft of course, and that really big battleship heheh.
The GLA would have much cheaper stuff, and worse obviously. They'd still need some kind of behemoth boat though lol.
It would be a really nice mod i think.
