The Silva Ranger 515 CL compass delivers superior accuracy, even in the most demanding conditions. Split-sighting mirror for superior accuracy when navigating on distant landmarks. Three scales for quick, easy plotting with any 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. The declination scale sets easily from the bottom of the compass. A clinometer lets you measure angles of inclination.