Declination adjustment scale allows you to account for the difference between magnetic and true north; scale on base is adjustable to your location. Three different clinometers for measuring slope angles -- useful for determining snow slope stability and for surveying. Two of the clinometer scales offer 5-degree increments, 1 offers 1-degree increments. Includes USGS map scale 1:24,000, ft, Universal Transverse Mercator (UTM) and mile scales for position accuracy. Waterproof field reference cards includes navigational, topographical and survival information that store in the compass. Includes built-in magnifier, protective, flip down cover and lanyard.