SIGHT REDUCTION & WORK SHEET PANELS

The Sight Reduction and Work Sheet panels offer two different methods to 
process your sights.  Both of them apply the Altitude Corrections and 
calculate the triangles.  The end result is the Azimuth and Intercept 
which are used to plot the LOP relative to your Assumed Position (AP).

The Sight Reduction panel is more automated and the Work Sheet panel 
offers more flexibility.

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The Sight Reduction panel works with the Almanac panel which provides the 
GHA and Declination (GP), Semi-Diameter (SD: Sun & Moon), and Horizontal Parallax 
(HP: Moon only) to the Sight Reduction panel.  The only thing you need to enter 
in the Sight Reduction panel is the sextant angle (Hs).  
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The Work Sheet panel has 3 modes of operation:

1. Use it as a plotting machine.  If the Azimuth or Intercept is not equal to 0, 
then corrections and calculations are skipped and the Azimuth and Intercept 
become the sight, in conjunction with the AP.  This is a minimum sight.  After 
entering the Azimuth and Intercept, tap [SAVE].  After saving the sight, 
it will appear on the Plotting Sheet.  This can be useful to plot a 
series of sights solved by another process.

2. Use it with Height Observed (Ho) and GP to calculate Azimuth and Intercept.  
The Ho is the sextant angle (Hs) with corrections applied, so if the Hs is set 
to 0, and the Ho is greater than 0, then this is a corrected sight, and the 
corrections are not applied.  Enter the GHA and Declination(GP), and the Ho, 
then press [CALC].  If the resulting Azimuth and Intercept look reasonable, 
tap [SAVE].

3. Use it with sextant angle (Hs), corrections, and GP to calculate the Height 
Observed(Ho), Azimuth and Intercept.  if the Ho is set to 0, and the Hs is 
greater than 0, then this is an uncorrected sextant angle (Hs), so the 
corrections are applied.  Enter the GHA and Declination(GP), sextant angle (Hs), 
Height of Eye (HE), Semi-Diameter (SD) for the Sun and Moon, and Horizontal 
Parallax (HP)for the Moon, then press [CALC].  If the resulting  Azimuth and 
Intercept look reasonable, tap [SAVE].  You can use the Almanac panel to get 
the GP, SD, and HP, and they will carry over to the Work Sheet panel.

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TERMINOLOGY REFRESHER:

GP,  This is the Ground Position of the Body.  It consists of the GHA and Declination.
Hs,  This is the Height Sextant, which is the sextant angle with no corrections applied.
Ho,  This is the Height Observed, which is the Hs with corrections applied.
      The corrections include DIP, Refraction, SD (Sun & Moon) and HP (Moon only).

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To be continued...