1 / 20

An aircraft departs position A on the 170°00’E meridian at 01:30 Local Mean Time LMT on 11 February on an easterly course. It arrives at position B on the 160°00’W meridian 3:00 hours later.

What is the LMT and local date of arrival at position B?

  • A
    06:30, 10th February
  • B
    07:30, 11th February
  • C
    02:30, 11th February
  • D
    01:30, 10th February

Refer to figure.

We should work with Greewich LMT => UTC.
(1) Calculate UTC at Departure Position A:
Position A: 170ºE
For places with East Longitude, LMT = UTC + dLong/15

  • UTC = 01:30 - 170º/15 = 14:10 on the 10 th of Feb

(2) Calculate UTC time of arrival at destination B:
14:10 UTC + Flight Time = 14:10 UTC + 3 h = 17:10 UTC
(3) Calculate LMT at Destination Position B:
Position B: 160ºW
For Places with West Longitude LMT = UTC - dLong/15
  • LMT = 17:10 UTC - 160º/15 = 06:30 LMT on the 10 th of Feb

Your Notes (not visible to others)



This question has appeared on the real examination, you can find the related countries below.