you have a number of classes of ship:
cruisers, escorts, science vessels, carriers, stealth ships,
but what you don't have is kind of odd:

TORPEDO SHIPS- a torpedo ship is a spacecraft that carries a massive payload of micro torpedos and has a large number of mounted micro torpedo launchers. torpedo ships could have a brief toggle limited ability that the launchers are not on a shared cool down.

obviously a torpedo ship is a form of escort craft.