Spectra Precision Survey Pro v4.6 Recon and Nomad User Manual - Manual (Page 166)

User’s Manual – Conventional Mode
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• Check the Correct to State Grid checkbox if you want the
computed azimuth corrected to align with the local state
plane coordinate system.
Note: The Central Meridian and Zone Constant values for the United
States are provided in Appendix A of the Reference Manual.
7. Refer to a current ephemeris and fill in the remaining five values.
When the screen is correctly filled in, tap the Shots tab.
Note: The GHA0 and Decl0 values are read from the ephemeris for
the current date. The GHA24 and Decl24 values are listed in the
ephemeris for the following day. The semi-diameter is in minutes and
seconds so your value will look something like 0.16084.
8. Tap the Shoot button to open the Enter Shot Data
screen.
9. Enter the correct hours to GMT in the Hrs To GMT
field, aim toward the backsight and tap Take Shot to
record the horizontal angle to the backsight. (The
true azimuth to this point will be computed at the
end of the routine.)
Note: The hours to GMT will be between +5 and +8
when in the continental United States.