[@Dinh AaronMk]

To also add on: Battleships too would fit in that net.

Aircraft Carriers and Battleships imply a certain degree of great national health and economic strength which no one in this RP should possess. They're size entails a great degree of expenditure to keep on the water, which'd be too much for even a nation the size of California by itself; let alone what is a third of the state of California.

The Essex-class Abe is trying to claim too is old as it is and being a former museum ship was probably stripped of its teeth to keep it moored at port. And given its port of retirement is San Fransisco, it should realistically exist as nothing more than a wreck at the bottom of the bay. And the USS Missouri is a museum ship interned in Hawaii, so how did California even get it?

There's also the practicallity of it all. There's no point in really using something larger than a patrol boat. Not only because it's more economical (I even originally pictured the Caribbean islands as trading out of the back of duct-tapped small yachts before they got picked up) but they're strategic value is pretty much lost once you can no longer maintain them. And in the setting of the RP any aquatic capability you have would be focused more into brown water or even green water. Not blue water as those are.

Submarines would require a certain degree of engineering capability beyond resources.

In all, the cruisers and destroyers might still be pushing it. But when you put them out to sea you still have no ships gun to fire. They're still a glorified small-arms platform and you might be able to anchor them out off-shore as a sea-fort. But even cargo ships could serve that purpose before they finally succumb to severe rust and sink.