PPRuNe Forums - View Single Post - Air Asia Indonesia Lost Contact from Surabaya to Singapore
Old 1st Jan 2015, 20:56
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Airbubba :
Hmmm, this .1 nm offset must not have made it to the real world.
No it was refused in the end by ICAO for 2 reasons : mathematically on crossings with offset you increase the collision risk model (risk area is bigger ) and on principle/legal grounds that you cannot voluntary impose a decrease in navigation accuracy.
So yes with augmented GNSS coming in you will cross in opposite directions with the centre bar in the windscreens on top of one another .

Brings us back to making absolutely sure our barometric Altitude accuracy is perfect, especially in RVSM above FL400....
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