A method of locating or plotting an unknown position from a known point by giving a direction and a distance along that direction line is called polar coordinates. The following elements must be present when using polar coordinates. – Current known location on the map – Azimuth (grid or magnetic) – Distance (in meters) This is a common task on a land navigation (Land Nav) course! 1. Place the index mark of the protractor at the center of mass on the point from which you are measuring. Figure 52 2. Locate the desired azimuth on the protractor scale and place a dot on the map at this azimuth. In our example, this will be 56°. Figure 53 3. Remove the protractor and connect the point and dot with a straight line. Figure 54 4. Select the appropriate scale measurement (we’ll use meters) and place a paper straight edge on the scale. Figure 55 5. Determine the desired distance to measure from the scale and mark the paper at this distance using tick marks. We’ll use 3400 meters. Figure 56 6. Align the straight edge with the azimuth line. Ensure the first tick mark is center of mass on the known point. Figure 57 7. Place a dot on the map at the second tick mark from the straight edge on the map. The position of the second tick mark is the position of the unknown point. Figure 58 8. Remove the straight edge and determine the grid coordinate to the second point. Figure 59