Spectra Precision FAST Survey Reference Manual - Manual (Page 221)

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After choosing a mode, simply apply the values to the appropriate blank and hit Solve. Points from your current job can
be selected to fill out the blanks as well. The points can be selected from the screen or from the point list by picking the
appropriate button icon. After the calculations have been performed, you will see the Clear, Results, and View
Triangle
buttons. Clear will clear the entry fields. Results will show the results dialog again. View Triangle will draw
the triangle on the screen connecting the points chosen for the calculation. The triangle calculator, using 3 points, is a
convenient way to calculate the interior angle between 3 points. For example, if you were setup on 1, backsighting 10,
and turned a 90 degree angle to 21, then the triangle defined by 10 to 1 to 21 would indicate a 90 degree angle at point
1.
Curve Calculator
The figure below shows the Curve calculator. Simply use the pull-down at the upper left to select the desired method
of curve calculation.
 Radius-Delta Angle
 Radius-Chord Length
 Radius-Arc Length
 Deg. of Crv.-Delta Angle
 Deg. of Crv.-Chord Length
 Deg. of Crv.-Arc Length
 Delta Angle-Chord Length
 Delta Angle-Arc Length
 Chord Length-Arc Length