Originally Posted by
gemma10
So now I`m going to ask a dumb question. In the IFR chart under EVEN why after 400 does it go ODD to 510?
Firstly, there are no 'dumb' questions, only inadequate answers.
Because, at higher altitudes, the physical gap between the Flight Levels gets smaller, and at some point, there has to be an increase in the Pressure Altitude between the Cruising Levels, to maintain the physical distance between the aircraft.
I recall a time earlier this year when French ATC advised me that "the only flight level available for you VFR is FL85 or FL105" whilst flying in uncontrolled airspace at FL100.
Whereabouts in France were you, where there was uncontrolled airspace at FL100?
MJ
