Hi,

In article ,
Bertie the wrote:
They don't use any of the Q codes in the US. QNH is one of the few still
in use around the rest of the world, the rest are pretty much archaich.
You stil occasionally hear QFE in the UK, but no airlines I know of are
using it anymore since modern airplanes aren't designed around their use
(QFE settings on the altimeter **** up the computers since the computer
is anticipating a QHN setting to run a bunch of other devices in the
airplane, of which pressurisation is the most relevant) Very
occasionally you hear QSY which is "see you, I'm going to talk to
someone else" and QDM almost never nowadays, but it used to be
relatively common and it's Mag direction to a station. And even less
used QDR which is the Mag radial from a station. I think the Maritime
world might use a lot more of them still, though.

The UK PPL syllabus still teaches QNH, QFE (the military use it here, and
some civil airfields will give it in the initial response). QDM, QDR and QTE
(true bearing) are also taught. QDM is on the R/T 'practical' test
generally.

Andy