The Hampton Nautical antique brass military compass is a true gem for any engineer. The compass card has the standard 0 - 360 degree scale, as well as the 0 - 64 mil scale (one yard at 1,000 yards). the Cardinal points are luminous for easy viewing in the dark, and the compass features a standard glass bezel with two lines at degree angles. The bezel also rotates with detents so you can change the heading reference a known amount without looking at the compass.----The front sight has a magnifier to simultaneously view the magnetic heading when taking a sight. Folding the sight down operates a needle lift mechanism to protect the compass bearing. On the side of the compass is a needle freeze mechanism to hold a reading. The lid of the compass has a glass window with a line etched into the glass for use as a rear sight. The outside of the compass has an antique brass guard to protect the glass.