RK Bali, Air Navigation
Time: DGCA Air Navigation questions
Time in navigation is longitude in another form. The Earth turns 15 degrees an hour, so a degree of longitude is four minutes of time and 15 minutes of arc is one minute.
The 30 questions are mostly conversion tables and worked problems: the LMT of one longitude from another's, zone time to UTC, flights across the date line, and sunrise moved along a parallel. Exam sessions have presented 3 of them.
Longitude east, UTC least: east of Greenwich, UTC is behind local time. IST is the mean time of 82 degrees 30 minutes E, so it equals LMT only on that meridian. Crossing the date line westbound you add a day; eastbound you take one away.
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Question 1 of 5
Mean time has been introduced in order to:
Question 2 of 5
An a/c is crossing IDL from 150° E to 108° W at 0000 UTC, at destination.
Question 3 of 5
At 10 hr 40 min at 160° E, difference between zone time and LMT will be.
Question 4 of 5
Local Mean Time of a place is the time lapsed since the transit of the mean sun over.
Question 5 of 5
I.S.T. and the LMT of a place can be the same only when.
25 more questions in this chapter
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