Spectra Precision FAST Survey Reference Manual - Manual (Page 60)

p58
JPN:
Use this code followed by a point ID to create a new line segment between the current point and the
entered point ID.
RECT
: This special code can be used in 2 different ways. You can take measurements to 3 sides of a building
and on the third side, add the special code RECT, and the program will create a 4-sided building. Or you can
measure two sides of a building and enter the distance right (RECT25) or distance left (RECT-20) to create the
other, parallel sides. Both methods are illustrated below.
OH and OV
: You can also create horizontal offset lines and you can offset these same lines vertically as well
by combining OH and OV as in EP OH0.5 OV0.5 (which might create a 6" over, 6" up back of curb parallel
3D polyline). You can even do multiple offset lines as shown below:
This example here leads to a series of 4 parallel lines (for railroad tracks in this case), all offset to the left
(negative) of the direction of the points 120 through 126.