Birdwatch Note Rating
2024-05-25 11:05:14 UTC - HELPFUL
Rated by Participant: F704FC09E050ECBFFF6159E39DECCD2315D3AA9395BA4E794B091B6C801539C6
Participant Details
Original Note:
The first published reports of contrails appeared during and shortly after World War I when aircraft were finally able to reach the altitudes required for contrail formation. https://go.gale.com/ps/i.do?p=AONE&sw=w&issn=&v=2.1&it=r&id=GALE%7CA168510659&sid=googleScholar&linkaccess=abs&userGroupName=anon%7Ed761e19e&aty=open-web-entry https://www.ifr-magazine.com/technique/laying-down-the-line/
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