Celestial Navigation · Star Identification
Pub. No. 249 Volume 1 (Selected Stars) is most useful to the navigator for:
- AReducing Sun sights only
- BPre-computing altitude and azimuth of seven selected stars for a planned sight, aiding identification✓ Correct
- CFinding the equation of time
- DMeasuring index error
Explanation
Vol. 1 tabulates altitude and azimuth of seven well-placed stars for each LHA Aries and latitude, letting the navigator pre-set the sextant and pick a good three-star spread for a fix and for star ID at twilight.
Authority: Pub. No. 249, Sight Reduction Tables for Air Navigation, Vol. 1
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Related Celestial Navigation questions
- Time
The Nautical Almanac tabulates the positions of celestial bodies against which time standard?
- Time
A vessel in west longitude has a zone description of +5. To convert zone time to UT you must:
- Coordinates
How is the GHA of a star obtained from the Nautical Almanac?
- Coordinates
Sidereal Hour Angle (SHA) is best defined as:
- Coordinates
Declination of a celestial body is the celestial equivalent of:
- The Nautical Almanac
Approximately how fast does the GHA of the Sun increase with time?