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Correct altitude

Featured Replies

I Have a problem when in the cruise I am told by the controller that i am at the wrong altitude, however my altimeter is correctly set and I am at the altitude that i have been cleared to and also as filed in thye flight plan.I even get altimeter updates from the controllers but I am still told that I am not at the correct level.What am I doing wrongBy the way can I congratulate you all on a truly great product

Hi there,Could you let us know:Where you were flying.What cruise altitude/flight level were you flying at?What altimeter setting were you using.All the best,John

  • Commercial Member

also what number do you have in the transition level/pca box on the controllers box. exactly, the number. 180, or 18000?jd

Sorry for the delayFlying from Jersey (egjj)to London Gatwick (egkk)assigned level 19000 feet indicated level at cruise 19000altimeter setting of 1033 i Think Cant be 100% sure on that one using FS9 real world Weather generatorRegards Ian

trans level/pca says by atc

>Flying from Jersey (egjj)to London Gatwick (egkk) assigned level 19000 feet indicated level at cruise 19000>>altimeter setting of 1033 i Think Cant be 100% sure on that>one using FS9 real world Weather generatorOK, Ian, problem solved - you're flying with the QNH set (1033) instead of the standard setting of 1013. Those 20mb difference will mean you're about 600ft too low.When you started RC with the Jersey-Gatwick plan, RC will have set the correct Transition Altitudes of 3000ft and 6000ft respectively from its database. Do you remember climbing out from Jersey and passing 3000ft your co-pilot said "altimeter check"? This was the signal for you to re-set your altimeter to 1013mb so that your altimeter reads flight levels instead of altitudes. RC would actually have cleared you to FL190, not 19000ft, a difference of about 600ft with that QNH.The same will happen on the descent when you pass the Transition Level - it would have been FL70 in this case - the co-pilot will call "altimeter check again and you should re-set the altimeter to the Gatwick QNH which approach will have passed with your descent clearance. Try the flight again with the same weather and listen carefully to the clearances RC gives and for the nudge from your co-pilot. :>)Pete

Hi Ian,That means atc determine the TL based on the local pressure at the time.The TL's are displayed when starting RC and also in the main RC window when it is running.As a general rule under these conditions:When assigned a flight level set standard altimeter (29.92 inches, 1013.2 HPa)When assigned to an altitude set the local pressure.Your copilot should remind you by saying 'altimeter check' at the appropriate moment.All the best,JohnAll the best,John

thanks for that I will give it a try

Hi Brad,It's the B key, and you are absolutely spot on in your assumption.You need to set 29.92/1013.2 manually in this situation.All the best,John

  • Commercial Member

keep in mind, that a limitation in fs9, the "B" key only sets the altimeter to 29.92 when you are above 18000.if your transition level is less, you will have to manually enter 29.92 when you hear "altimeter check"jd

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