The Silva Ranger 515 CL compass delivers superior accuracy, even in the most demanding conditions. The split-sighting mirror ensures superior accuracy when navigating on distant landmarks. The base plate has three scales for quick, easy plotting with a topographic map. Silicone feet provide positive grip on a map. The geared declination allows you to set and forget the declination for the area you are in, ensuring constant compensation for this variable when taking bearings. A clinometer lets you measure angles of inclination.