Things You'll Need. Engineer (lensatic) compass. Open the engineer compass until the cover is 90 degrees to the compass case.
Tilt the lens bracket approximately 30 degrees from the perpendicular position of the compass. Check that the dial is floating freely.
Place your thumb in the loop on the side of the compass. Hold the compass level by your thumb and index finger. Raise the compass up to your eye.
Line up the sighting groove in the bracket with the wire and an object in the distance. Keep your head still and then read the azimuth through the lens bracket. Note the red number on the dial, which is the degrees under the black index line on the compass face.
Open the compass completely and hold it level in front of you. Turn the compass in a horizontal manner until the azimuth is directly beneath the black index line on the face. Rotate the bezel on the face of the compass until the indicator is directly over the "north" position (indicated by an upper case "N").