Fed: Planes flying in "commercial" airspace must get GPS
VOR-DME writes:
I just told you, and you didn't get it.
None of the things you mention provides navigation capabilities. The aircraft
and its crew still have to be able to determine where they are. They cannot do
that with datalinks or other gadgets unrelated to navigation. Even remote
ground control of aircraft would require some sort of on-board navigation
system, unless the system relied on theoretical calculations and dead
reckoning, which would be hopelessly inaccurate in practice.
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