The PAB-2М periscopic artillery compass is designed to measure magnetic azimuths (bussols), horizontal and vertical angles in the area, as the main angular measuring device of the battery and division. In addition, the distance to the objects in the area can be determined by means of an external base distance gauge (with a special two-meter rail) using a compass.

The bussol can be operated in the temperature range from minus 40ºC to positive 50ºC at a relative humidity of up to 65% and at a normal temperature (25 ± 10) ºC at a relative humidity o up to 98%.

The periscope artillery compass consists of a compass, a periscope and a tripod.