A number of posters have said it is OFCOM that regulates frequency allocation and legitimate usage - With which I understand and agree.
However, it remains unclear to me that keying the voice carrier for the purpose of conveying a message is not a legitimate usage (and on this point I am already aware a number of you disagree).
However, if you are correct, why does the CAA choose to express this restriction against using the voice carrier to signal as
- only a specific instance (PCL),
- only for some aerodromes (licensed fields - at all times even if they are operating unlicensed at the time)
- with a CAA managed exception for certain emergency services use (on airband rather than police band radios)
Rather than a general restriction that 'forbids carrier key signalling within UK airspace on aviation frequencies - this includes the use in PCL'.
The regulation as drafted feels much more like addressing an Aviation Safety concern someone had/has about landing at unattended aerodromes at night.
Or is this another example where the regulations are written in an indirect and overly wordy way so as to introduce ambiguity and the opportunity for increased bandwidth consumption on PPrune
