Latitude from a Polaris altitude using the a₀ + a₁ + a₂ Nautical Almanac corrections.
Formula
$$ L = H_o + a_0 + a_1 + a_2 - 1^\circ $$Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $H_o$ | Observed altitude (corrected) | ° | sextant |
| $a_0$ | Polaris main correction by LHA Aries | ' | Nautical Almanac |
| $a_1$ | Latitude correction | ' | Nautical Almanac |
| $a_2$ | Month correction | ' | Nautical Almanac |
| $L$ | Latitude | ° | result |
Sources
- HM Nautical Almanac.