Fast, simple and accurate, A-10 baseplate compasses are quick to learn and ideal for navigating with a map and compass. For calculating the distances, A-10 has both metric and imperical scales printed in red to stand out on topographic map. FeaturesHigh grade steel needle with jewel bearingBalanced for northern hemisphereFixed declination correction scaleLiquid filled capsule for stable operationDetachable snap-lock lanyard. Easy to detach for working with the map