On Monday 26 March 2007 04:03, STANLEY DOORE wrote: > I was under the impression that the world flies at foot-based flight > levels.
Western Europe and Brazil fly in feet, but Russia and China fly in meters. > To change to all-metric entails a massive cost of changing altimeter > measurement and display equipment and training pilots. All of these are > based on safety. New commercial planes have soft displays so it would be > less costly to change displays on them, however, the need for education and > training still exists for pilots, many of whom are private small plane > people. Would it make any sense to take the existing flight levels and round each to the nearest 100 or 50 meters? Or would it be better to use the 300 m spacing that Russia and China use? The latter system would result in an H-day scenario when the levels change. (H day (högre = right) was when Sweden switched sides of the road.) Pierre
