Originally Posted by
Mach E Avelli
For the USA to file nonstandard phraseology differences with ICAO would fill a volume as thick as a telephone directory.
It’s unfortunate enough that they persist with feet and statute miles for lengths, US quarts and gallons, and inches Hg, but they reckon they have a right to those things because (to misquote that wonderfully politically incorrect song), “they got the bomb”.
You're right about the length! I looked up the US AIP and the formal list of differences is huge.
https://www.faa.gov/air_traffic/publ...ction_1.7.html. And affirm/affirmative does not even get a mention, so who knows how many other differences there are...