CAP 413
Radiotelephony Manual
Chapter 10 Page 3
3.3
Weather and Aerodrome Information
3.3.1
At aerodromes where ATIS is installed, all weather and aerodrome information
transmissions are to be prefixed with a letter code. The letter code is to start with the
letter of the alphabet coincident with the first weather issued for the day. Each
subsequent weather issued is to be assigned the next letter of the alphabet including
'Met Specials'. The letters I, O, Q and Z are not to be used. If all letters are used in
the course of a day/night, then the alphabet is to be started again from the beginning.
Pilots are to quote letter of weather and aerodrome information received on initial
contact with each appropriate ATC element. Additionally, before taxiing or joining a
visual circuit, the pilot is to confirm the runway information he has received. Where
ATIS procedures do not apply, weather and aerodrome information may be passed to
aircraft either in full or abbreviated. Abbreviated information is only to be passed if
colour code is better than green. Training units may require the addition of flying
phase information.
3.3.2
The long weather and aerodrome information is to be passed in the following order
and format:
• Aerodrome/letter code.
• Time.
• Runway in use.
• Surface wind.
• Colour state.
• Visibility.
• General weather observations (when applicable e.g. fog, rain).
• Cloud levels and amounts.
• Temperature.
• Altimeter setting.
• Runway condition reading (RCR)/runway visual range (RVR) (if applicable).
• Unserviceable aids/facilities (as appropriate).
3.3.3
The short weather and aerodrome information is to be passed in the following order
and format:
•
A
erodrome/letter code.
• Time.
• Runway in use.
• Surface wind.
• Colour state.
• Altimeter setting.
• Unserviceable aids/facilities (as appropriate).
3.3.4
Some emergency, civil or non-British military aircraft may wish to fly in accordance
with different pressure setting procedures. If a pilot requests the use of QNH during
the final approach the controller may omit QFE and substitute QNH and elevation in
appropriate messages.
31 March 2011
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