Spectra Precision Survey Pro v4.6 Recon and Nomad User Manual - Manual (Page 159)

Other Tutorials
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4. Enter a positive offset distance in the Horz Dist Offset field if the
offset to the new point is behind the rod location (from the total
station’s point of view), or enter a negative offset distance if the
new point is in front of the rod location.
5. If the new point is at a different elevation than the rod location,
enter the a positive vertical offset in the Elevation Offset field, or a
negative vertical offset if the new point is below the rod location.
6. After all the appropriate fields are filled in correctly, aim the total
station at the prism and tap the Shoot button. The offset
distance(s) entered will be applied when computing the
coordinates for the new point and the new point will be stored as
a side shot.
Horizontal Angle Offset Screen
The Horizontal Angle Offset screen is used to store a new point that
lies on a line tangent to the rod and perpendicular to the line formed
between the total station and the rod. (See illustration.) The routine
requires two shots by the total station; one at the prism, located to
the side of the new point; and one in the direction of the new point.
This example explains how to store a point at the center of an
obstacle – such as a big tree.