The compass, with self-luminous light sources to facilitate use during periods of darkness, is for obtaining magnetic azimuths for ground navigation, reconnaissance, and fire control purposes.

The Lensatic Compass is military unique because it must operate satisfactorily and not be damaged during the rigors of world-wide battlefield deployment. The compass is required to survive and perform in extreme cold and heat, not be damaged when dropped onto hard surfaces, or leak when submerged in water. In addition, the self-excited luminous sources (which have in the past utilized radioactive material) must not be damaged by thermal shock caused by sudden temperature changes of −52°C to 68°C and have a "luminous life" of 12 years, minimum.