PPRuNe Forums - View Single Post - QNH 1000 - digit by digit or 'wun tousand'?
Old 18th Aug 2009, 11:20
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2 sheds
 
Join Date: Sep 2000
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For goodness' sake, this is getting tedious...

Anyone got any answer for the QNH/QFE one tousand or one zero zero zero issue??????
What would be the correct answer in the written R/T exam do you think?


To summarise...

CAP413 (UK RTF Manual) specifies:
When transmitting messages containing aircraft callsigns, altimeter settings, flight
levels (with the exception of FL 100, 200, 300 etc. which are expressed as ‘Flight
Level (number) HUN DRED’), headings, wind speeds/directions, pressure settings,
transponder codes and frequencies,
each digit shall be transmitted separately.

The ICAO RTF Manual not only specifies the same but gives specific examples of 1000 hpa and 1010 hpa.

The UK used to specify "one thousand" for that specific value, but then fell in line with ICAO several years ago.

one was taught One Zero Zero Zero by Nats instructors at Hurn
one was taught One Thousand by Nats OJTIs at unit


Therefore, one was taught correctly at the college and one or two unit OJTIs were not up to speed. The CAA have certainly been quite emphatic on this point to the training colleges.

The procedure does seem somewhat illogical and possibly potentially hazardous, I would be the first to say. If you feel strongly - or if there is a mismatch with unit OJTIs - why not direct the effort to CAA, either directly or through CHIRP? Do something about it!

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