Celestial Navigation · The Nautical Almanac
If consecutive hourly declinations of a body are increasing, the 'd' correction is:
- ASubtracted from the tabulated declination
- BAdded to the tabulated declination✓ Correct
- CApplied to GHA instead
- DSet to zero
Explanation
The navigator inspects whether declination is increasing or decreasing between the two hourly entries. Increasing declination means the d correction is added; decreasing means it is subtracted. The d value's magnitude comes from the Increments and Corrections pages.
Authority: Nautical Almanac
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