Transition Level won't be a variable because it varies from country to country and can vary within areas within a country (like the UK). If you are flying any posh aircraft with built in altitude alert - the one that dings at you as you approach 1000ft to go to target altitude - a crafty dodge is to dial in 1000ft above TA rather than your cleared level. When it dongs reset altimeters to 1013.25 and dial in your cleared level. bones -----Original Message----- From: jhb_airlines-bounce@xxxxxxxxxxxxx [mailto:jhb_airlines-bounce@xxxxxxxxxxxxx] On Behalf Of FrankTurley@xxxxxxx Sent: 14 November 2006 09:10 To: jhb_airlines@xxxxxxxxxxxxx Subject: [jhb_airlines] A question of altitude My brain woke up this morning with a wizzo idea to help decrepit pilots like me, why not a cockpit indicator which warned you that you were passing through the transistion level and need to reset the altitude gauge? I searched through the FSX variable list looking for something like transition level, but failed. I then had a quick hunt through the FSX events list, and found - Barometric - Syncs altimeter setting to sea level pressure, or 29.92 if above 18,000 feet. From that I assume that the transition level is hard wired into the code at 18,000 feet. OK for the USA I guess. Frank T.