you need
  • Compass
Imagine that you are standing in the center of the circle, which is divided into 360 equal parts, and the zero mark points towards the north.The rest of the strokes, respectively, will be sent to your location from the point in different directions.
Using samples deposited about each stroke, you can specify the direction of any selected object as a reference point on the ground.Assume that the power line support is located opposite to the stroke count of 270. This would mean that this object is from us in a direction that is defined by this count.The angle, in degrees, measured in a clockwise direction from the north to the direction
of a predetermined reference point, called the azimuth th.
to determine the azimuth and grab a compass, release the brake of the magnetic needle.Give the compass a strictly horizontal position.After the needle stops to oscillate and settle down, align the zero division of the dial to the end of the arrow that points to the north.You have just made orienteering compass.
Now carefully, so as not to bring down the orientation of the compass, rotate the cover so that the fly has been directed toward the selected benchmark and slot - in your favor.To do this, you must look through the slot, and fly to the landmark.It should be to the end of the arrow was always aligned with the zero point.The countdown is located next to the pointer (near flies) will be a numerical expression azimuth and at the landmark.
If you face the inverse problem, that is, finding the right direction from the known azimuth y, then the pointer from flies to equal a given Azimuth at the count (for example, 300 degrees).Now set the compass horizontally orientated to north in the manner described above.Carefully, trying not to knock orientation, look at the area through the slot and fly.On this line, select some landmark.Focus on your point of standing on the landmark will correspond to a given azimuth have.