Latitude at local apparent noon from observed meridian altitude of the sun and its declination - the classical LAN sight.
Formula
$$ L = Z \pm \delta $$
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $Z$ | Zenith distance (90° − H_o) | deg | sextant |
| $\delta$ | Sun declination | deg | nautical almanac |
Sources
- Bowditch Pub.9 Ch.22.