Sunrise Time on an Airplane
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Question
Sunrise on a flight: should it be according to the visibility of the sun from the plane, or according to the sunrise on the ground at the location of the plane? What is the source for this ruling?
Answer
Shalom Rav
The time is determined according to the location on the ground over which the plane is flying.
This is what our teacher, shlita, instructed, and it is a simple reasoning.
[It is obvious that for someone standing on a ladder, the time does not change compared to someone standing next to them on the ground].
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