Birdwatch Note Rating
2023-04-15 21:17:50 UTC - HELPFUL
Rated by Participant: B65BEAC42E1AFDC0BB2DEC539F7F07453FDD484CE1F0BDA381F6688C5AF8693E
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
All Note Details