Thank you for the magic formula...
Will pass it along for the next Atlantic crossing, where we use the Mach technique separation.
I am sure Recife and Sal ATC will appreciate the formula too.
My last flight in 747 is on the 20 NOV... Will make a note for my Piper L-21.
We file for Mach .85... shall we file for Mach .8498678945031...?
xxx
Sorry to be dumb uneducated, low IQ pilot. Never got a "fATPL", you see... Just FAA certificates.
Happy contrails