Spectra Precision Survey Pro 3.80 Recon GPS Reference Manual - Manual (Page 88)

GPS Reference Manual
88
Toward CL / Away CL : is the computed horizontal distance that the
rod must move either toward the centerline or away from it,
respectively, before it is positioned at the catch point.
Note: The computed horizontal distance is based on the observed
terrain computed from the last two shots. If only one shot has been
taken, it is assumed that the terrain is level when computing this
value.
On Station / Back Sta / Ahead Sta : informs you if the rod is on the
station being staked, or the distance it must move (parallel to the
centerline) back or ahead to be on the correct station.
HD to HP : is the horizontal distance from the rod to the hinge point.
VD to HP : is the vertical distance from the rod to the hinge point.
HD to CL : is the horizontal distance from the rod to the centerline.
VD to CL : is the vertical distance from the rod to the centerline.
Line and Offset
6WDNHRXW /LQH DQG 2IIVHW 
The instructions for the Line and Offset routine for GPS similar to
the conventional method, except that the
%DFNVLJKW button is replaced
with a 6HWXS +5 button to configure rover antenna and the backsight
information is replaced with rover antenna height information. See
the conventional Reference Manual for details.