Waterproof, Compact ChartKits with Digital Charts and SoftwareWaterproof Compact ChartKits are made for easy, in-hand use and built to handle the weather. At half the size of the original ChartKit, each title covers approximately one-third the area of a full-size version. These titles are printed on tough, tear-resistant plastic pages that are also totally waterproof. All coastal U.S. titles include FREE Companion Charts for the region which may be downloaded to your PC. Compact 12" x 17" size Waterproof, tear-resistant pages Pre-plotted courses and GPS waypoints for quick reference Free digital charts and software for your PC for home planning and onboard navigation. ChartKit's original spiral binding