RIDGID NaviTrack II - Manual (Page 13)

NaviTrack® II
12
If the poles are not in evidence, extend the search. The object is
a maximum signal point which falls off in all directions. For best accuracy the NaviTrack® II should be level. The
antenna mast must be vertical when marking the Poles and
Equator, or their locations will be less accurate.
Figure 20: Screen Display In Different Locations (Sonde)
On the pole On the equator Approaching the 2nd pole