Doomfullord
The Lord Full of Doom
This is making me want a fallout hawaii. Overall, searching for island resources probably would be a bit of a stretch, but I can certainly see the NCR using ship to go up north or south from California. Why just expand outward towards the desert and mountains? Will they have a fully fledged navy, primed to retake America? No, probably not. Certainly they'll have people scouting out areas, and watching from the coast and such. Possibly some trading merchants along the coasts. Pirates though, I'm not too sure of. I'd personally see merchant ships just having guards like a caravan, not even ships for them though. Ship to ship combat probably won't be cannons firing off, but gun battles and a lot of boarding.