A simple toy battleship designed with Tinkercad.
You might want to enlarge it to get roundish main gun barrels.
Supports needed for the guns and the front and back slops
Printer:
Da Vinci 1.0 Pro
Rafts:
Yes
Supports:
Yes
Resolution:
0.2mm
Infill:
30%
CAD: Tinkercad
Slicer: Simplify 3d 4.0