[higgmeister]

States have jurisdiction to 3 miles out. With Florida and Texas, it’s 9 miles on the Gulf side.

That's what I always understood, if it is a Federal boundary it is also the State's.

[scrabblehack]

Federal waters go out 12 nautical miles; a weaker set of claims goes out 24 nautical miles, and the “Exclusive Economic Zone” goes out 200 nautical miles.

All of the boundaries are subject to “or half the distance to the next country, whichever comes first.”