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Old 20th Sep 2015, 08:58
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Neptune262
 
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Unfortunately ICAO Doc 4444 is not that clear on the matter.

See the picture (Figure 7-3) in Section 7.9.2 and read the text in Section 7.10.1

Then read the text in 7.10.2 which can be seen to contradict this.

The words "reasonable assurance", "will not normally be permitted" are not the best......and then of course there is the... "unless otherwise prescribed by the appropriate ATS authority"

If you need to find doc 4444 then google it and you can get enough of the current edition to see what I mean.

Note: It is surprising that the USA way of doing things is acceptable to ICAO, when most of the world does it differently. I would have thought that pilot understanding of the words was the paramount factor here.....seems not to worry ICAO that there is no global standard.

As an example of the USA way of doing things, you can listen to the RTF from "Audio Las Vegas Aircraft Fire" (YouTube) regarding the BA B777 and you will hear the cleared to land on 07R for two aircraft before the B777 tried to depart from 07L
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