Own excellent value & superior accuracy with the Silva Polaris 177. Large numerals at every 20° mark and a clear base plate with inch and millimeter markings and a 1:24,000 scale make it easy to read a map, set bearings and plan a trip with the Silva Polaris 177.
•2° dial graduations
•Declination scale for quick adjustments of map bearings to field headings
•Inch & millimeter rulers
•1:24,000 map scale
•2 X 4 in.