The solution is so simple and now I that am going to mention it I expect CART will impliment it.
There is over a million teenagers with a black box tracker in their car for insurance purposes. Drive too fast, drive too far and your insurance is cancelled or goes up.
These work on the GPS system and they have a multi-carrier chip inside so they can report your driving habits, speeding, braking etc back to the central computer using whichever network works in your current location. If you unplug it you get a text immeadiately asking why. In fact you have to email them to say your car is going to the garage and it will be electically disconnected before you even go.
A simple black box bolted to the roof of every boat will be a necessary requirement for a CC Licence, checked at every inspection and photographically confirmed as you cruise by the new camera system that will be set up similar to the number plate recognition cameras that you drive by everyday checking your car tax and insurance. If you are out of 4g reception the black box memorises your movements and uploads it as soon as reception is resumed. There would be a little transmitter in your black box to communicate your ID with the camera network as you cruise by the camera.
This will be controlled by a central computer with infringement tickets sent out automatically and CART could lay off hundreds of employees that would cover the cost of the system.