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Problem at Thule

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Paul,What runway did you select for the origin airport in the FMC? The runway you entered on the ROUTE Page under the origin airport will show up on your NAV display, but it may not be where your aircraft is sitting at the moment. Is there a crossing runway out in front of you maybe? I can't see from the screenshot and I'm not familiar with Thule so you may have a AIRAC data problem if your entries in the FMC are correct.Kim

supporter.jpg

Paul,I see you have the REF switch in TRUE which means the nav display is referenced to true north which does not happen to be at the magnetic north. My best guess is that the runways in the database is referenced to magnetic north. Up near the north/south pole you will find variations of up to 180 degrees. For your reference the MAG VAR at Thule is 58.308W which looks pretty much like your ND display. Basic General Navigation stuff!Martin

Both guesses wrong, you found an error in the airac data. I've compared the data in the wpNavAPT.txt file with FS9 default data; regardless of mag var drift in the past couple years the airac is way off:AIRAC 0706:THULE BGTL08T10000008 76.529833 -68.765000109.5008500167THULE BGTL26T10000026 76.532175 -68.648242000.0002600251FS9:Rnw 15 N 76 31.80 W 068 45.58 HDG 152 ALT 263.1 (76.530000 / -68.759667)Rnw 33 N 76 32.01 W 068 38.87 HDG 331 ALT 263.1 (76.533500 / -68.647833)ILS15 109.5 CRS 148Here is the fix (I'll also email Richard and let him know); copy and paste the following into the wpNavAPT.txt file located under PMDG/FMCWP/NAVDATA over the existing entries for THULE... white space must be spaces not tabs and the columns must line up:AIRAC correction:THULE BGTL15 10000152 76.530000 -68.759677109.5014800263THULE BGTL33 10000331 76.533500 -68.647833000.0000000263I've tested it and it works. Good catch.Edit: After the copy and paste you'll have to adjust the lines such that there is no break between the "76" number and the "68" number, just make sure the two lines look just like all the other lines of data in the file.

Dan Downs KCRP

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