Plane-sailing solution: difference of latitude (D.Lat) and departure from course and distance, valid for short distances (≤ 300 nm).
Formula
$$ \Delta \phi = D \cos C, \quad p = D \sin C $$
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $D$ | Distance | nm | rhumb-line |
| $C$ | Course (angle from North) | deg | gyro / chart |
Sources
- Bowditch Pub.9 Ch.24.