If the Doviello were to get an enhanced Navy, there are only 2 ways I can see it working: 1) Animals. Preferably things more primal than giant tortoises. 2) Like the Reavers in Firefly. Strapped together barges that shouldn't rightly float and no sane man would occupy. Fortunately it isn't crewed by sane men, and they don't mean to get farther than the next ship with it anyhow.