Birdwatch Note Rating
2023-04-15 18:15:08 UTC - HELPFUL
Rated by Participant: C3C7473535B918A552589E037738D33C923B03F434A3341C21FD7A2A92A8A0AF
Participant Details
Original Note:
Flights in the same direction are multiples of 1000 ft apart in altitude. That difference in altitude makes one plane look faster. Atmospheric conditions vary at different flight levels. Those conditions determine the formation of ice crystals, also known as contrails. https://www.faa.gov/regulations_policies/policy_guidance/envir_policy/media/contrails.pdf
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