even the pros dont get it right

"Chris" wrote in message
...

Yes. It serves two pruposes: To avoid confusion between "to" and "two"
and to avoid confusion between "climb to 5000ft" and "climb 5000ft"


Do you have a reference for that? I found a site that says the ICAO
standard is "climb to 5,000 feet".


"An example the FAA uses is that ICAO standard phraseology requires the
use of the phrase 'climb to 5,000 feet' while the U.S. filed to use
'climb and maintain 5000 feet.' FAA believed that there could be
confusion when using the ICAO phraseology in that situation as to whether
the command was climb to five thousand feet or climb two five thousand
feet. Currently, the FAA requires controllers to comply with standard
U.S. phraseology as filed with ICAO."


with respect in the example about the instruction would be to climb to
flight level 250 so the example is not realistic.


The example quoted in the top message above is "climb to 5000 ft".

"Steven P. McNicoll" wrote in message
link.net...

"Chris" wrote in message
...

Yes. It serves two pruposes: To avoid confusion between "to" and "two"
and to avoid confusion between "climb to 5000ft" and "climb 5000ft"


Do you have a reference for that? I found a site that says the ICAO
standard is "climb to 5,000 feet".


"An example the FAA uses is that ICAO standard phraseology requires the
use of the phrase 'climb to 5,000 feet' while the U.S. filed to use
'climb and maintain 5000 feet.' FAA believed that there could be
confusion when using the ICAO phraseology in that situation as to
whether
the command was climb to five thousand feet or climb two five thousand
feet. Currently, the FAA requires controllers to comply with standard
U.S. phraseology as filed with ICAO."


with respect in the example about the instruction would be to climb to
flight level 250 so the example is not realistic.


The example quoted in the top message above is "climb to 5000 ft".

The point is there would not be an instruction to climb two five thousand
feet, such an instruction would be to climb FL 250 so confusion should be
limited.
Climb to five thousand cannot be confused with climb FL250

"Chris" wrote in message
...

The point is there would not be an instruction to climb two five thousand
feet, such an instruction would be to climb FL 250 so confusion should be
limited.


But still possible, THAT is the point.

"Steven P. McNicoll" wrote in message
ink.net...

"Chris" wrote in message
...

The point is there would not be an instruction to climb two five thousand
feet, such an instruction would be to climb FL 250 so confusion should
be limited.


But still possible, THAT is the point.

Less possible than someone screwing up with affirmative and negative for
example.