EASA NAV(A)basic
A 10° change in longitude corresponds approximately to what time difference?
Answer
40 minutes
Explanation
Earth rotates 15° per hour, or 1° in four minutes. Therefore, $10^\circ \times 4$ minutes equals 40 minutes. **Key takeaway:** Longitude converts to time at four minutes per degree.\n\n**Glossary:** **Longitude**: angular position east or west; **UTC**: Coordinated Universal Time, the aviation time reference.
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