Simple... run the boats illegally.
May as well take an M-79 along with you and take out the government gunboats when they close in.
Enough is enough.
Then they bring more moats, and aircraft...
Interesting concept but mmmmmmm somewhat FLAWED in the application by a couple of decades or so.
"M79?" "Government Gunboats?" Are you still stuck in the last Rambo movie?
Drones, dude! If you want to be final about it, armed drones. A kinetic citation in final form with no appeal as our own Travis McGee's character's might use.