The PortBook app makes it easy for boaters to find marine services by name, location, and service offered. Trusted by boaters for over 30 years, PortBook was created for boaters by boaters and features businesses up and down the East Coast with special concentrations of businesses in Newport, Annapolis, and Charleston. While the main focus of PortBook is marine services, it also features restaurants, bars, and attractions, because even the most serious boater goes ashore now and again, and what better recommendation can you have than that of another boater.