(K. Ari Krupnikov) writes:

If you've still got a radar target you can still separate from a NORDO
aircraft. If you've got no radar then everything beneath the NORDO is
effectively shut down until it's known to be on the ground.

If you are NORDO, your mode C might not work either... How would ATC
know who's below it?

You are supposed to be flying at your planned altitude. I don't know
how far ATC would be willing to trust that, though -- you'd certainly
be within your rights to choose a different altitude to avoid
turbulence or icing.

How good a job can primary surveillance radar do on picking out a
target's altitude? Obviously, SSR won't help.


All the best,


David