A cargo ship with 16 added cannons still disguised as a cargo ship.
No armor, 16 knot top speed, unknown range.
Works without infinite fuel and infinite electricity.
The cranes are used to swap out the magazine brick things. I couldn't fit in a proper magazine without a good bit of rearranging, so I put in bricks of 27 shells that can be emptied, and once at port, exchanged with bricks full of ammo.
Uses Zizo's modular engine controller.