Logbook for GPS Navigation - Most yachts & motor boats now use GPS as their primary source of positional information when navigating. The page layout of this excellent logbook has been designed for clear entry of GPS positions and waypoints. The left page (as Illustrated above) is for passage planning, which is so important, but so often overlooked, and the right is for plotting positions on passage. Spec. 240 x 171mm, 128 pages