Note: This may or may not be correct but this is what I interpret as ship designs that would be in real-life.
This is a Fighter Craft. It has 4 L.A.S.E.R Turrets with an 8 Man Crew.
This is a Corvette, armed with multiple L.A.S.E.R Turrets
This is a Frigate, Armed with alot of L.A.S.E.R Turrets. Has a Circular Center.