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The target height is also important in the examples mentioned above. Only set the target height to a non-zero value
if observing to a target held above the feature to be surveyed.
In the case of a traverse or a range and bearing observation, a target is usually held above the ground over the
point that will be occupied by the Quarryman Pro. Therefore measure the height of the target above the ground.
Similarly, when carrying out face profiling operations, the hole collars are not usually visible from the instrument
location on the quarry floor. Therefore a person holding a tall target on a pole should stand over each collar. Use
the Quarryman Pro to shoot a single observation to the target at each collar.
Figure 40 Embossed cross on the side panel to measure instrument height
Figure 41 Target on survey pole being used to position a hole collar
