Air traffic controllers direct commercial flights to fly at “even” or “odd” levels. The general rule in most parts of the world is aircraft going east will fly at odd levels, i.e. 35’000 feet, while aircraft heading west will fly even levels, i.e. 34’000 feet. – Tiny Fox Lab Facts
The East is Odd, West is Even Odder
'East is Odd, West is Even Odder' is a pilots mnemonic to remember what altitudes to fly at under visual and instrument flight rules.
Jesse, posted on 11/19/2019, 1,474 views