dragon Posted March 26, 2003 Share Posted March 26, 2003 NAT Strict adherence of MACH or advise ATC CDA within 0.01 MACH, or advise ATC Here’s my question. Why does 5% come to mind when discussing speed, or is it 0.5 IAS/MACH or 0.05? For some reason the 5 sticks in my mind and I cannot remember for the life of me. [Cannot find it anywhere either..] Did there used to be, or is there currently a requirement for a 5 [%, 0.05 or IAS/MACH in the NAT, CDA, EUR or NO/SOPAC airspace?] dragon Link to comment Share on other sites More sharing options...
Guest Posted March 26, 2003 Share Posted March 26, 2003 Are you trying to make a MACH-ory of this regulation?? Sorry Dragon, I just had to. Link to comment Share on other sites More sharing options...
Guest bcpilot Posted March 26, 2003 Share Posted March 26, 2003 I'me not sure, but I seem to remember something about having to report a change of 5% or more of your TAS. It was probably on one of the IFR exams but that was a LOOOOOONNNNGG time ago!! LOL Don't quote me on this but it seems to ring a bell! Link to comment Share on other sites More sharing options...
Guest regular joe Posted March 26, 2003 Share Posted March 26, 2003 Hi Dragon. Check out your A.I.P. RAC 11.13 for NAT and RAC 12.1 for ATC. Keep in mind that on the NAT tracks and RVSM airspace there are large areas without radar coverage. Hope this helps. Link to comment Share on other sites More sharing options...
Guest regular joe Posted March 26, 2003 Share Posted March 26, 2003 I guess I should have read your question a again. The 5% is in reference to TAS specified in the IFR flight plan. RAC 8.2.2 Link to comment Share on other sites More sharing options...
Guest George Posted March 27, 2003 Share Posted March 27, 2003 +/- 5% TAS or +/- .01 Mach Link to comment Share on other sites More sharing options...
dragon Posted March 27, 2003 Author Share Posted March 27, 2003 Thanks all of you, here is what I found. RAC 8.2.1 MACH NUMBER Clearances to turbojet aircraft equipped with a mach meter may include an appropriate mach number. If the mach number cannot be adhered to, ATC is to be informed when the clearance is issued. Once accepted, shall be adhered to within .01 MACH, unless ATC approval is obtained to make the change. if a temporary in mach number is necessary [ie turbulence] atc is to be notified as zoom as possible. RAC 8.2.2 TRUE AIRSPEED ATC is to be notified as soon as practicable of an intended change to the true airspeed [TAS] at the cruising level or altitude where the change intended is five percent or more of the true airspeed specified in the ifr flight plan or itinerary. RAC 11.8.2.c DOMESTIC CLEARANCES – NATWESTBOUND TRAFFIC Westbound turbojet aircraft which have preceded across the North Atlantic and have entered CDA shall maintain the last mach number assigned by ATC: unless, approval is obtained from ATC to make a change, or until the pilot receives an initial descent clearance approaching destination. Robert: You were doing so well.. bcpilot: Thanks, I think it was a CPL Q, yeaaars ago. rj: you are obviously no regular joe, thanks. George: short and sweet, thanks. dragon Link to comment Share on other sites More sharing options...
Guest nudger Posted March 27, 2003 Share Posted March 27, 2003 Well since everyone indicated it is in the AIP, I thought I thought I would mention what the CARs say since the AIP is not an enabled document... Changes in the Flight Plan 602.76 (1) The pilot-in-command of an aircraft for which an IFR flight plan or an IFR flight itinerary has been filed shall follow the procedure set out in subsection (2) where the pilot-in-command intends to make any change in the plan or itinerary in respect of (a) the cruising altitude or cruising flight level; ( the route of flight; © the destination aerodrome; (d) in the case of a flight plan, the true airspeed at the cruising altitude or cruising flight level, where the change intended is five per cent or more of the true airspeed specified in the IFR flight plan; or (e) the Mach number, where the change intended is .01 or more of the Mach number that has been included in the air traffic control clearance. (2) A pilot-in-command of an aircraft who intends to make any of the changes in the IFR flight plan or the IFR flight itinerary that are referred to in subsection (1) shall (a) notify as soon as practicable an air traffic control unit or the responsible person, as the case may be, of the intended change; and ( where the flight is being conducted in controlled airspace, receive an air traffic control clearance before making the intended change. Link to comment Share on other sites More sharing options...
Guest nudger Posted March 27, 2003 Share Posted March 27, 2003 Since everyone mentioned where to find it in the AIP I thought I would mention where it is in the CARs since I don't think the AIP is an enabled document... Changes in the Flight Plan 602.76 (1) The pilot-in-command of an aircraft for which an IFR flight plan or an IFR flight itinerary has been filed shall follow the procedure set out in subsection (2) where the pilot-in-command intends to make any change in the plan or itinerary in respect of (a) the cruising altitude or cruising flight level; ( the route of flight; © the destination aerodrome; (d) in the case of a flight plan, the true airspeed at the cruising altitude or cruising flight level, where the change intended is five per cent or more of the true airspeed specified in the IFR flight plan; or (e) the Mach number, where the change intended is .01 or more of the Mach number that has been included in the air traffic control clearance. (2) A pilot-in-command of an aircraft who intends to make any of the changes in the IFR flight plan or the IFR flight itinerary that are referred to in subsection (1) shall (a) notify as soon as practicable an air traffic control unit or the responsible person, as the case may be, of the intended change; and ( where the flight is being conducted in controlled airspace, receive an air traffic control clearance before making the intended change. Link to comment Share on other sites More sharing options...
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