"Icebound" wrote in message
.rogers.com...

Since 000 is not a real direction... (North is 360) ..., is there some
significant history why easterly/westerly cruising altitudes were chosen
on
the basis of: 000-179 --- 180-359
as opposed to the more intuitive: 001-180 --- 181-360 ???

Invented by a C-programmer perhaps? :-)

More likely invented by someone who proposed odd altitudes 000 track =
180 and even tracks for 180 track = 360, and overruled by an ICAO
committee that didn't understand the difference between an integer and a
real.

Julian Scarfe