posted on Oct, 26 2005 @ 03:47 PM
Originally posted by japike
How close to an airport would you need to be to see such patterns as in the above photo?
you dont have to be anywhere near an airport to see them, because they are formed at high altitude. every pick i've seen looks like normal jet
traffic along airways.
listen people, i am an air traffic controller. i can tell you for a fact that every picture i have seen on this thread is a normal contrail, and
nothing else. they form at high altitude, and then sheer into large clouds depending on the velocity of the winds at said altitude. sometimes they
dissipate quickly, sometimes they stay pretty well formed for hours, depending upon the winds, which usually increase exponentially the higher you go
(every once in awhile you have calm wind conditions, even at high altitude). their formation also depends upon the temperature and moisture in the
air. on cold days, you tend to see alot more than normal, and since there are alot
of airways up there, especially over the eastern US
(believe me, we spend the first couple of months in our training program just memorizing maps with all that info on them), you see alot of contrails
intersecting. you even occassionally see a circle contrail because some poor bastard got put into a holding pattern for whatever reason.
and by the way, for whoever it was that said they are called victor routes, you were half right. there are victor routes and jet routes (in the
US...everywhere else is ICAO, which is basically international rules, and tends to be different). victor routes are below 18,000ft or flight level
180 (fl180) and jet routes are above that. they are collectively referred to as airways.
i would assume that anok lives near a military restricted area (where they play around ...dogfight, refuel, etc) and what he was looking at the day he
claims to have seen the same two continuously for two hours was some kind of military excercise. just a guess on that one though.
i will be happy to answer anybody's questions to the best of my ability in reference to contrails, or any other matter involving ATC.