Mr. ps. Not trying to be argumentative but from the Boat US site:
Is my BoatUS Towing Service valid wherever I boat?
Yes. BoatUS Towing Service follows you and your boat. No matter where your homeport is or where you keep your boat. If you're within a TowBoatUS service area, BoatUS will provide for towing service up to your selected service level. Your local TowBoatUS Unlimited Service Area can be found here
TowBoatUS Boynton Beach
Riviera Beach, FL, 33404
Unlimited Service Area:
130 Miles Offshore
Might be worth a call to find out what's what.