Well they are all navy (other than the cutter) variants. The carrier variant (which I think is what you are referring too) carries 2x 20-inch rapid fire mass drivers, 4 standard anti-ship missiles, truncated anti-frigate/corvette (a.k.a. light) missiles, 4x point defense/anti-ground lasers.
the carrier variant is the one on the bottom? I noticed that it seems to have two ship names on it. Like how shuttles in star trek would have their own names but also have the registry number of their carrier on them.