Originally Posted by
oceancrosser
Well, I am not an expert but I understand your predicament. My operator has been working on this issue for years. The sheer stupidity of a different communications protocol for Europe vs rest of the world is astounding.
I suspect you will need a separate datalink box for Europe on a 737. But I will happily stand corrected.
Dear ocencrosser,
FANS 1/A lacks both,
- the required integrity (10 -6), and
- the required latency for high density European airspace!
At the time the ATN mandate was selected, FANS 1/A was dismantled in the US (for good),
(and only restarted more than a decade later.)
Still today it is only operational in 2 or 3 centers and lacks major parts of ATN functionality,
Check stuck mic, just being one of them.
The 2 different DL standards are unfortunate, but originally satisfied very different requirements:
primary COM in low density airspace vs. Secondary COM in high density with VHF coverage.
cheers.