ho i get part ammonition, torpedo, & utility.. 4 day i play still no idea how to get 3 part to mount all my ship
when completing battle lines, there's a chance to find part blueprints. the battle itself will depend on what type, main battery, hull, or special. once you've found some, you can build them in the shipyard (build part). main batteries and hulls build exactly that, but special may give torpedo, ammunition, sub batteries or utility.