Return track and return heading
- Reciprocal track (B back to A): add 200, subtract 20 (TP 1102, Reciprocal Track).
- Drift reverses on return: 10° left outbound = 10° right back (TP 1102).
- Return heading:
2 × track − heading + 180. Example: heading 250, track 242 (drift 8° left) gives return track 062, drift 8° right, so steer 8° left: heading 054.
Trap: taking the reciprocal track, or keeping the outbound drift on the return.
References
- TP 1102 (Reciprocal Track: add 200 and subtract 20, drift reverses)