Only 200 miles, it looks like :- /
The Coast Guard has law enforcement powers within U.S. waters, which extend 200 miles from shores, and on international waters. Coast Guard authority supersedes that of the U.S. Navy in terms of law enforcement — a Coast guard captain can halt, board and even seize any vessel without a warrant, court order or direct orders from a superior, including U.S. Navy vessels.
https://science.howstuffworks.com/coast-guard.htm
Thanks I did not know that. Good to know
In the moments of a pirate attack unless the CG is near by I say send some F15s from Tyndall AFB