Leica Geosystems GPS System 500 - Technical Reference Manual - Manual (Page 215)

215 7. Measuring with System 500 Technical Reference Manual-4.0.0en
There are two methods which you
can use to find your way to a point.
These are Polar and Orthogonal. Use
the F2 key to switch between the two
methods.
7.5.5 Polar and Orthogonal
Orthogonal
The Orthogonal method gives you a distance In/Out to the point, a distance
left/right to the point and a cut/fill.
O - Orientation direction (Orient)
P - Current Position
I/O - Horizontal Distance (In/Out)
L/R - Horizontal Distance (Left/Right)
C/F - Vertical Distance (Cut/Fill)
T - Target Point
Note: In - from current position to
target along the orientation direction.
Out - from current position to target
180° from orientation direction
Left/right - looking along orientation
direction, distance left/right to target
point.