Maptech WaterProof Book WPB320-01 Narragansett Bay to Cuttyhunk and Block Island, 1st Edition, also Includes: Fishers Island Sound and New London, CT 12 x 18" Spiral-bound Chartbook Complete Offshore, Coastal and Harbor Chart Coverage Waterproof, Synthetic Pages and Binding Cruising Facility Information (located on charts) GPS Waypoint Labels on Chart Pages Pre-drawn Routes with Magnetic Bearing and Distances Detailed Index Additional Lat/Lon Grid Lines on Most Harbor Charts