Spectra Precision Survey Pro v3.80 Recon iPAQ Reference Manual - Manual (Page 55)

Job Menu
R-49
Note, if is selected in the list, the ,QVHUW button will change
to an $SSHQG button to indicate that additional points will be
appended to the end of the list.
Screen Four – Add/Edit Curve
The fourth screen is used to modify a selected polyline segment that
occurs between two points. A horizontal, vertical, and/or spiral curve
can be applied to the polyline segment.
Adding a Horizontal Curve
Tap the $UF 6SLUDO tab.
Curve : must be set to Arc to enter a horizontal curve.
5DGLXV | 'HOWD | 'HJUHH $UF | 'HJUHH &KRUG :
allows you to specify the radius of the curve using a
variety of methods.
Turn : specifies if the curve turns toward the Right or Left
as you occupy the initial point and face the end point.
Arc : specifies if the arc of the curve is Small (less than
180°) or Large (greater than 180°).