Suunto A-20 Compass:
Using a Two Zone System, the Suunto A-20 Compass is balanced based on only the northern and southern hemispheres. This means that the northern hemisphere balance also provides accurate readings in many northern parts of the southern hemisphere. The A-20 is designed for the northern hemisphere, so if you're traveling very far into the southern hemisphere, you may want to look for a compass balanced to that location. Performance features include a detachable snap lock lanyard, ruler, fixed declination correction scale, orienting compass, baseplate compass, luminous markings, and control marking holes