My argument is as follows. Take any ICAO document, say 8168, 4444, or Annex 2 - according to them flight levels must be chosen according to the "table of cruise flight levels". Nowhere it is mentioned that there are exceptions and that exceptions are given in AIP. Actually even in AIP section Altimeter Setting Procedures there is typically also no mention of section 3.2 (ATS routes) - where those airways are given. It seems that AIP section of ATS routes is not interlinked with any other document and there is no referral to it. It seems to be completely isolated and hence you can not determine operational significance of its contents.
Do dispatchers rely on general "table of cruise flight levels" or refer to ATS routes section of AIP? What is significance of data given in ATS routes section regarding flight levels?
Last edited by GSLOC; 4th May 2010 at 21:23.