Navigationhard#280
The departure formula for east-west distance is:
A
Distance = d.long (min) × cos(lat)
CorrectB
Distance = d.lat × cos(long)
C
Distance = d.long × sin(lat)
D
Distance = d.lat × sin(long)
Explanation
Departure (NM) = change in longitude (minutes) × cos(latitude). This converts longitude difference to actual distance at a given latitude.
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