Maptech Kits are full-color reproductions of government charts. The U.S. Coast Guard uses ChartKits. So do the Bahamas Air/Sea Rescue Association, state Marine patrols and commercial fishermen. Individual 22x17-inch Charts are spiral-bound into easyto-use regional collections. Fullsize ChartKits cover a complete region. Compact ChartKits are selected charts folded and spiral bound into smaller 12x17-inch books -- ideal for smaller boats cruising local waters.