EASA NAV(A)advanced
78. Route A–B is 120 NM. After 55 NM, the aircraft is 7 NM right of track. What approximate course change reaches B directly?
Answer
14° left
Explanation
The 1:60 rule estimates track error as $60×7/55≈7.6°$. The remaining-track correction is about $60×7/(120−55)≈6.5°$; combined correction is about 14° left. **Key takeaway:** Correct for both accumulated error and the remaining route. **Glossary:** 1:60 rule: approximate angular-to-lateral error relationship.
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