The Silva Ranger CL compass delivers superior accuracy, even in the most demanding conditions. The large mirror enhances accuracy when sighting on distant landmarks. Three scales provide quick, easy plotting with any topographic map. Romer scales can be used to create grid references for use with ordinance maps. 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.