Where would I find...
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Where would I find...
Chaps(& Chapesses): I wonder of you indulge me? Is the ICAO publication "Phraseology Reference Guide" the definitive guide used by nation states to base their own ATC procedures upon or is there another guide. I'm particularly looking looking for guidance regarding the legitimacy or otherwise as the issuance of unsolicited taxi clearances. Such a clearance might be given when a ground controller sees aircraft is in a position to taxi, has not requested a clearance, but to help things along gives a clearance like "Bigjet 123, when ready taxi to holding alpha and hold short." It's the source documents which I'm particularly interested in.
Replies gratefully received via the normal channels,
Replies gratefully received via the normal channels,
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Piltdown, the document you reference is actually a Eurocontrol thing and highlights some particular bits of standard phraseology. The ICAO references for RTF comms procedures and phraseology are spread through Annex 10 Vol II, PANS-ATM (Doc 4444) and the Manual of Radiotelephony (Doc9432).
The problem, though, is that there is no such thing a an exhaustive and comprehensive standard set of phrases. The Foreword to the Manual of Radiotelephony includes the following 'ICAO phraseologies are developed to provide efficient, clear, concise, and unambiguous communications, and constant attention should be given to the correct use of ICAO phraseologies in all instances in which they are applicable. However, it is not possible to provide phraseologies to cover every conceivable situation which may arise, and the examples contained in this manual are not exhaustive, but merely representative of radiotelephony phraseology in common use. Users may find it necessary to supplement phraseologies with the use of “plain” language. When it is necessary to use plain language, it should be used according to the
same principles that govern the development of phraseologies in that communications should be clear, concise, and unambiguous.'
I don't ever recall seeing rules for issuing a ground clearance in anticipation set out in a document, but I did it on numerous occasions when I was working in ops. Usually I did it when I was trying to be helpful and when it might save time. I would only have done it with a crew or driver that I thought was going to be able to understand the non-standardness of the clearance and was always ready to do a disregard and to go back to the normal standard phraseologies and procedures if it was not received in the spirit that it was offered.
The problem, though, is that there is no such thing a an exhaustive and comprehensive standard set of phrases. The Foreword to the Manual of Radiotelephony includes the following 'ICAO phraseologies are developed to provide efficient, clear, concise, and unambiguous communications, and constant attention should be given to the correct use of ICAO phraseologies in all instances in which they are applicable. However, it is not possible to provide phraseologies to cover every conceivable situation which may arise, and the examples contained in this manual are not exhaustive, but merely representative of radiotelephony phraseology in common use. Users may find it necessary to supplement phraseologies with the use of “plain” language. When it is necessary to use plain language, it should be used according to the
same principles that govern the development of phraseologies in that communications should be clear, concise, and unambiguous.'
I don't ever recall seeing rules for issuing a ground clearance in anticipation set out in a document, but I did it on numerous occasions when I was working in ops. Usually I did it when I was trying to be helpful and when it might save time. I would only have done it with a crew or driver that I thought was going to be able to understand the non-standardness of the clearance and was always ready to do a disregard and to go back to the normal standard phraseologies and procedures if it was not received in the spirit that it was offered.
Last edited by Spitoon; 18th Mar 2013 at 13:15. Reason: Because I hadn't finished!
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The context was that a crew was having a discussion about various non-ATC related items and a controller, quite reasonably in my opinion, tacked an unrequested taxi clearance onto the end of the discussion. The crew read back the clearance and taxied. Unfortunately, they omitted one or two (very important) items before they taxied. Therefore I'm trying to confirm that such clearance are legitimate. Obviously local rules may prevent this, which I'm not too bothered about, it's just the overall principle that I'm interested in.
Thanks again,
PM
Thanks again,
PM
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As a principle, such a clearance can be entirely legitimate - it can meet all the rules for an ATC clearance. Circumstances will influence (and opinions will differ on) whether it is good practice.
The only thing that comes to mind to think about that might come under your heading of local rules is where the boundary between ATC and Apron Control is and who you're talking to.
The only thing that comes to mind to think about that might come under your heading of local rules is where the boundary between ATC and Apron Control is and who you're talking to.
