ESEE's Compass Cards are a Land Navigation tool designed for use with compass and scaled map. It includes instructions for fundamental cross-country navigation techniques, reference tables, map scales and more. An included UTM Grid Reference overlay assists in plotting location on Universal Transverse Mercator map projections. Features:Weighs just 1 oz. and measures 2.13” x 4.25” x .13” for easy pocket carry.Three double-sided instruction cards provide navigation and map reading fundamentals.Four transparent map overlay cards for calculating azimuths, UTM coordinates for GPS and Topo map, distance, area, kilometers to miles, miles to kilometers, and magnetic declination.Includes the following metric scales: 1:24,000, 1:25,000, 1:250,000, 1:50,000, 1:100,000Includes a tangent table for triangulating distance and location.