Celestial Navigation · Time
The equation of time is:
- AThe difference between apparent (Sun) time and mean time✓ Correct
- BThe time it takes light to reach Earth from the Sun
- CThe difference between zone time and UT
- DThe correction for the observer's height of eye
Explanation
The equation of time is the difference between apparent solar time (the real Sun) and mean solar time (a fictitious uniform Sun). It is tabulated in the Almanac and is needed when predicting the watch time of local apparent noon.
Authority: Bowditch (Pub. No. 9)
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