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Search: Posts Made By: DaveReidUK
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Forum: Spectators Balcony (Spotters Corner)
25th Oct 2016, 23:25
Replies: 8
Views: 3,283
Posted By DaveReidUK

Because FL350 rarely equates to exactly 35,000...

Because FL350 rarely equates to exactly 35,000 feet above either the Earth's surface or the WGS84 ellipsoid, and the relationship will vary throughout the flight (though not usually by much).
...
Forum: Spectators Balcony (Spotters Corner)
25th Oct 2016, 09:03
Replies: 8
Views: 3,283
Posted By DaveReidUK

That was my first thought too. The aircraft is...

That was my first thought too. The aircraft is maintaining a pressure altitude, and fluctuations in the IFE-displayed value could indeed suggest that the latter is being derived from GPS.
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