nsproles Posted November 7, 2023 Share Posted November 7, 2023 This is a Flightaware flight plan route from YMML Melbourne to VCBI Colombo. N0470F340 DCT NEVIS H345 AD N640 ISLAV/N0465F360 N640 EGAVI/N0476F380 N640 ELATI/N0465F400 N640 HE Q210 MTL L897 HK DCT I can decipher it except for items in the format "N0470F340" and "N0465F360" etc. Can anyone explain what they mean? The flight plan leaves jet route H345 and joins jet route N640 over YPAD Adelaide so would I be correct in assuming that AD means Adelaide? Windows 11, GeForce GTX 1660ti; 3.60 gigahertz AMD Ryzen 5 3600 6-Core; Kingston SA2000M81000G SSD; 16 gb RAM; CH yoke; Saitek pedals; Three monitors; TrackIR 3. Link to comment Share on other sites More sharing options...
nsproles Posted November 8, 2023 Author Share Posted November 8, 2023 On 11/7/2023 at 9:32 PM, nsproles said: I can decipher it except for items in the format "N0470F340" and "N0465F360" etc. OK, I have realised that *****F340 means FL340 etc. but I would still like to find out what the N0470 etc. means if anyone can help me. Windows 11, GeForce GTX 1660ti; 3.60 gigahertz AMD Ryzen 5 3600 6-Core; Kingston SA2000M81000G SSD; 16 gb RAM; CH yoke; Saitek pedals; Three monitors; TrackIR 3. Link to comment Share on other sites More sharing options...
tiger1962 Posted November 8, 2023 Share Posted November 8, 2023 1 hour ago, nsproles said: OK, I have realised that *****F340 means FL340 etc. but I would still like to find out what the N0470 etc. means if anyone can help me. That part looks like either an airway number or a waypoint identifier to me. Tim Wright "The older I get, the better I was..." Xbox Series X, Asus Prime H510M-K, Intel Core i5-11400F 4.40GHz, 16Gb DDR4 3200, 2TB WD Black NVME SSD, 1TB Samsung SATA SSD NVidia RTX3060 Ti 8Gb, Logitech Flight Yoke System, CH Pro Pedals, Acer K272HL 27", Windows 11 Home x64 Link to comment Share on other sites More sharing options...
nsproles Posted November 9, 2023 Author Share Posted November 9, 2023 11 hours ago, tiger1962 said: That part looks like either an airway number or a waypoint identifier to me. tiger1962, I don't think so. I cannot find any airway number or waypoint identifier in the vicinity to match that. I am not sure that "NO...." is purely text or alpha-numeric, ie. the O could be for Oscar or it could be a zero. They seem to occur only when there is a change in FL and then when they are at a waypoint. For example, I interpret "N640 ISLAV/N0465F360 N640 EGAVI" as meaning flying on Jet Route N640 until reaching way point ISLAV, then climb to FL 360 and continue on Jet Route N640 until EGAVI". I have confirmed that both ISLAV and EGAVI are waypoints. I have also noted that sometimes the prefix letter is "M" and not "N". Windows 11, GeForce GTX 1660ti; 3.60 gigahertz AMD Ryzen 5 3600 6-Core; Kingston SA2000M81000G SSD; 16 gb RAM; CH yoke; Saitek pedals; Three monitors; TrackIR 3. Link to comment Share on other sites More sharing options...
nsproles Posted November 9, 2023 Author Share Posted November 9, 2023 I believe that I have the answer to my own question. "N" refers to TAS in nautical miles per hour (i.e. knots) and "M" to TAS expressed as a Mach number. I have checked this hypothesis against several live flights in Flight aware and it stands up. 1 Windows 11, GeForce GTX 1660ti; 3.60 gigahertz AMD Ryzen 5 3600 6-Core; Kingston SA2000M81000G SSD; 16 gb RAM; CH yoke; Saitek pedals; Three monitors; TrackIR 3. Link to comment Share on other sites More sharing options...
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