Celestial Navigation · Equation of Time
The equation of time is the difference between:
- AApparent (sundial) time and mean (clock) time✓ Correct
- BGMT and zone time
- CLatitude and declination
- DGHA and LHA
Explanation
It is apparent solar time minus mean solar time, varying through the year (up to about ±16 minutes). It is used to predict the time of local apparent noon for a meridian (latitude) sight.
Authority: The Nautical Almanac, equation of time; Bowditch (Pub. No. 9)
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