Spectra Precision Survey Pro v3.80 Recon iPAQ Reference Manual - Manual (Page 205)

Curve Menu
R-199
PVC / PVI Elevation : is the elevation for the specified point.
Begin Grade : is the grade at the tangent of the PVC.
End Grade : is the grade at the tangent of the PVT.
6ROYH : computes the details for the vertical curve.
/D\RXW : accesses the Parabolic Curve Layout screen (Page R-200)
where you can solve for an elevation at a specified station, or solve for
a station at a specified elevation.
Results
PVC sta. : is the station at the PVC.
PVI sta. : is the station at the PVI.
PVT sta. : is the station at the PVT.
Hi/Lo sta. : is the station where the vertical curve has a tangent equal
to zero (the crest of the curve).
elev. : is the elevation for the respective point.