As outlined in the Treaty of the Traverse, all Assembly races are required to use these types of starships.

Battleships (870m): Support crews of about 500 hundred, massive ships with massive firepower

Cruisers (480m): Support crews of around 200, big ships with middling firepower

Destroyers (300m): Support crews of 60 max, able to sustain a crew for up to 4 months without shore leave

Corvettes (85m): Support crew of <20, not meant to be lived on for more than a week at a time

Carriers (700m): Carry massive amounts of troops and support vehicles, built to sustain thousands of people for months on end