Spectra Precision Survey Pro v4.5 Ranger Reference Manual - Manual (Page 81)

Job Menu
R-73
Turn: specifies if the curve turns to the Left or Right as you face
the curve from the beginning.
; Make this segment tangent to previous : When checked, the
start of the specified curve will be tangent to the ending tangent of
the previous segment.
Azimuth / Bearing : is used to enter a known azimuth or bearing
at the start of the curve.
: adds the curve to the current horizontal alignment.
Edit Segment – Spiral Card
The Spiral card is used to add a spiral curve to the alignment.
Radius: is the radius of the spiral. (This
equals the radius of the horizontal curve
tangent to the spiral.)
Length: is the length of the spiral.
Turn: specifies if the curve turns to the Left or
Right
as you face the curve from the
beginning.
Dir: specifies if the curve runs from TS to SC
(Tangent to Spiral, to Spiral to Curve) or CS
to ST
(Curve to Spiral, to Spiral to Tangent).
; Make this segment tangent to previous : When checked, will
automatically turn the spiral so the beginning is tangent to the end of
the previous segment.
Azimuth / Bearing : is
used to specify a known
azimuth or bearing of the
start of the spiral.