Azimuth measuring mechanism: It consists of a compass, an illuminated gate and a sight. The outer azimuth division circle is a 360 division system with a minimum grid value of 2; The inner ring is divided into 60-00 dense positions and the minimum grid value is 0-20 dense positions. See table for conversion of density and grade. Measurement accuracy: 0-10 mil 1
Range Prediction: It consists of light gate, scope, etc. The angle between the two tips of the sighting star and the centerline of the sighting gate is 1-00mm, the length between the two tips is 12.34mm, and the length between the sighting gate and the sighting star is 123.4mm, resulting in a 10:1 ratio range estimate . The measurement accuracy is 5%
Pitch angle measuring mechanism: It consists of a deflected clock plate, a pendulum, a flat mirror and the like, and the measuring range is plus or minus 90 degrees. Measurement accuracy 2.5
Coordinate ladder ruler: consists of a long ruler on one side and a short ruler on both sides perpendicular to each other. The ruler is 120 mm long. Measurement accuracy: 0.5 mm.