Produced by The COMET® Program
- Introduction
- Basics
- The Intercept Method
- A Day in the Life of a Navigator
- Recap
- Overview of a Day in the Life of a Navy Navigator
- Dead Reckoning Plot
- Preparing for a Morning Observation
- Three-Star Fix, Morning
- Morning Sun Line
- Local Apparent Noon
- Observing LAN
- Advancing a LOP
- Estimated Position
- Afternoon Sun Line
- Obtaining a Running Fix
- Preparing for the Evening Observations
- Three-Star Fix, Evening
- Summary
- Supplemental Material
- References and Resources
- Contributors
A Day in the Life of a Navigator » Three-Star Fix, Morning » Exercise: Sight Reduction for Deneb and Fomalhaut
For our example, at time 08:00:00 UT on 17 July 2018, Hs for Deneb = 49° 02.1' and Hs for Fomalhaut = 27° 00.4'. Height of eye = 10 ft. Index correction = -0.4' and we are ready to perform the sight reduction.
Chief Sheedy: Now that we’ve observed Capella, we’re somewhere on that line of position, but how do we find out exactly where we’re at? We observe other stars. In this case, we observe Deneb. The sextant altitude was 49 degrees 02 decimal 1 minutes. At time 0800 00 seconds GMT, we observed Fomalhaut. The sextant altitude was 27 degrees 00 decimal 4 minutes.
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