The MC range of mirror compasses provides an invaluable tool for those who place a particular premium on accurate and reliable directional measurements; for example surveyors, miners, architects, rescue patrols, hikers, boaters and the military. The declination adjustment system, standard throughout the range, is especially useful when working in areas of large magnetic variation, while the sighting notch provides superior accuracy. global needle · clinometer · large mirror · jewel bearing · adjustable declination correction scale · additional sighting hole for superior accuracy · baseplate with magnifying lens · luminous two-color bezel ring · detachable snap lock lanyard