Mercator sailing solution - rhumb-line course and distance between two points using meridional parts, the canonical chart-work method.
Formula
$$ \tan C = \frac{DLo}{DMP}, \quad D = DLat \cdot \sec C $$
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $DLo$ | Difference of longitude | min | lon2 − lon1 |
| $DMP$ | Difference of meridional parts | min | meridional parts formula |
| $DLat$ | Difference of latitude | min | lat2 − lat1 |
Sources
- Bowditch Pub.9 Ch.24.