PLEASE HELP!If you are flying a regional flight and are cruising at 18000, will ATC cancel your flight plan if:A) You have your altimeter set to the assigned pressure?or :( You have your altimeter set to STD?ATC cancelled my flight plan! Doh! What if your flying right around the transition flight level? Any thoughts?Thx in advance!(8-|

Set your altimeter to 29.92 while cruising AT or above 18,000' MSL. (or FL180) This is the U.S. standard, I'm sure it is different in other parts of the world. The reason for this is to allow for consistent vertical separation of aircraft traveling on IFR "Jet routes" while passing through changing areas of barometric pressure. The terrain in the U.S. allows this to safely take place at altitudes above FL180.The idea being: If everyone uses the same altimeter setting, everyone will be at the same point in space when flying at a certain altitude.This would be unsafe below the altitude of the highest terrain in the country that you happen to be flying in. Mountains are ALWAYS at the same altitude, regardless of the barometric pressure. :)

Thanks for the help!! Time to go fly. . .again! :7 (8-|