julian46

IRIS / GPS / NAV drift

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When flying the 737NGX (800) Ive noticed a few times on final when lined up for ILS auto landing, the plane is on final and everything looks good but touches down about 20-30ft to either side of the runway. (eg flying Europe to Gander NL Canada). Never seen it on a shorter flight. Anyone think this is more scenery related (ORBX) or to due with some sort of drift somewhere in the Nav system ?


thanks - Julian

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15 minutes ago, julian46 said:

Anyone think this is more scenery related (ORBX) or to due with some sort of drift somewhere in the Nav system ?

If you're flying an ILS approach, the aircraft is receiving direction from the ILS array. IRS has zero input to an ILS approach, and subsequent autoland.

(i.e. Yes, scenery, and nothing to do with the aircraft.)

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FSX or P3D?

If FSX then download free registry repair tool from Flight1 and run it as admin.  If P3D we are going to need a lot more specific information.

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Its P3D V3.4 - its only happened twice on two longer flights - (ORBX Global Base and Norther America) with Vector - not a huge deal - just wanted to know if I was missing something (systems / procedure wise) on longer flights ..

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If it was a default scenery then it could be that the real world airport has changed you can go to Herve sors which provided updated magnetic corrections based on the yearly changes due to slight shifts in magnetic variations. 

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