Bob Noel wrote:

In article , wrote:

Doesn't Alaska Airlines have a special procedure into Juneau with RNP
less
than 0.3?

Yes, but that is bogus RNP, in that they use terrain mapping radar and
some
other enhancements to keep off the canyon walls.

anything that helps the nav system maintain containment and integrity
is perfectly ok.

--
Bob Noel

By that definition, eyeballs work well when you can see.

No doubt that belts and suspenders work well, but using the terrain mapping
feature of airborne weather radar doesn't fit the ICAO definition of RNP. It
works at Juneau because of the topography. It wouldn't work at most places.