Figure 2-2. Distance Measurements from Stadia Readings

TM 5-6675-329-13 & P

Figure 2-2. Distance Measurements from Stadia Readings

To simplify the distance reading, the footscrew (Figure 1-2, item 2) closest to the line of sight can be turned until

the lower stadia hair is on a full decimeter (foot) value. Only the upper stadia hair has now to be read and the subtraction

is easier.

2-7

LINE LEVELLING (see Figure 2-3)

To determine the difference in elevation between two widely separated ground stations, a line of levels is run

between the two stations, e.g. stations A to E in Figure 2-3. A number of intermediate instrument set-ups is selected so

that the sighting distances from the instrument-to-staff are about 30-50 m (100-150 ft).

2-9