Celestial Navigation · Sight Reduction — Pub 229
With what three whole-degree arguments do you enter Pub. No. 229 to obtain computed altitude (Hc) and azimuth angle (Z)?
- AAssumed latitude, declination, and local hour angle (LHA)✓ Correct
- BDR latitude, GHA, and SHA
- CObserved altitude, dip, and refraction
- DZone description, GMT, and longitude
Explanation
Pub. 229 is entered with assumed latitude, declination, and LHA — all whole degrees — to extract tabulated Hc, a d-value for declination interpolation, and azimuth angle Z. The assumed position is chosen so these arguments are whole degrees.
Authority: Pub. No. 229, Sight Reduction Tables for Marine Navigation
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