alloy k4074 Zinc high quality American compass with luminous light outdoor multifunctional high precision compass

3. Measure the magnetic azimuth A. Determine the magnetic azimuth of the target on the map (1) Calibrate the map with the compass and keep the map still; (2) Tangent the surveying and mapping ruler to the connecting line between the point and the target point, adjust the dial seat, and align the index "△" with the "0" scribed line; (3) After the magnetic needle is stationary, the scale on the dial base indicated at the north end is the magnetic azimuth value from the point to the target point. B. Determination of magnetic azimuth of local target (1) Turn on the instrument, align the azimuth index "△" with "0", and make the reflector slightly 45 ° to the dial base; (2) Put your thumb through the lifting ring, hold the instrument flat, and aim at the geodesic target through the collimation star; (3) Look at the score on the dial seat aligned at the north end of the magnetic needle from the reflector, which is the magnetic azimuth value of the local target

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