Celestial Navigation · Sight Reduction — Z to Zn Southern Latitude
In south latitude with LHA less than 180°, the true azimuth Zn is:
- AZn = Z (no change)
- BZn = 360° minus Z
- CZn = 180° plus Z✓ Correct
- DZn = 180° minus Z
Explanation
South latitude rules: LHA > 180° → Zn = 180° − Z; LHA < 180° → Zn = 180° + Z. The azimuth-angle-to-true-azimuth conversion depends on both the latitude name and whether LHA is greater or less than 180°.
Authority: Pub. No. 229 / Pub. No. 249 conversion rules
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