The Weems & Plath GPS Plotter is a simple and ingenious interface between a GPS and a paper chart. It enable the latitude and longitude obtained from a GPS to be quickly, easily and accurately plotted on a paper chart in a simple two-step maneuver. Its innovative slip and grip feature helps to ensure accuracy . The instrument also features protractor markings so that it can serve as a conventional plotting device and parallel rule. Designed and manufactured in England, the GPS Plotter is make in a sturdy, clear acrylic for maximum chart visibility and in one size to cover all chart sizes. Dimensions: 6” x 20”.