Re: low temperature correction
when clearing you to a lower altitude in a radar enviroment, the controllers typically add a correction to the cleared altitude. i.e. If in the summer they clear you cross a fix at say 10,000 FT, as the temperature drops below IAS, that altitude will rise to 11,000, and then possibly 12,000. This is the case in Canada,the USA, and presumably in Scandanavia. All I can say about our friends in Beijing is,...typical. Obviously the pilot retains ultimate responsibility so if your unhappy with the terrain clearance, advise that you want to remain at some higher altitude. But DONT unilaterally just add 10%/20%etc as I have heard being done. Assuming ATC 'has' added a correction, then you do, there is a potential conflict with a/c descending above, so let ATC know your intentions. You still need to correct the procedural altitudes, DA, MDA, etc.
Last edited by dartman; 6th Jan 2006 at 16:51.