Example for calculating the distance
The height of the lighthouse is 80 meters. The
value read off the reticle plate is 6.7.
8
8
7
7
6
6
5
5
4
4
3
3
2
2
4
4
3
3
2
2
1
1
1
1
2
2
36
Distance (in m) =
Distance (in m) =
3
3
4
4
Elevation angle = Vertical angle
Azimuth angle = Horizontal angle
This is then calculated as follows:
100 x 80 meters divided by 6.7, resulting in a
distance of 1,194 meters.
Height of observed object (m) x 100
Elevation angle of observed object
Length of observed object (m) x 100
Azimuth angle of observed object