On Thursday 22 March 2007 05:21, Stephen Gallagher wrote: > > Has anyone thought what it would take to get all countries to > > switch to metric > > flight levels? > > Are you referring to altitude?
Yes. Each country or region has a system in which planes flying in certain directions keep certain altitudes: those flying at 10.0 km fly northeast, those at 10.3 km fly southeast, those at 10.6 km fly southwest, and so on. The assignment of directions to flight levels varies by country. See "Flight level" on Wikipedia. phma
