TCASAlert From , joined Dec 1969, posts, RR: Posted (3 years 7 months 1 week 1 day 15 hours ago) and read 8315 times:
Just noticed VS901 NRT-LHR is taking a very northerly route today - just coasted in southbound near Murmansk! Usually they take a much more southerly route, anyone know the reason for this? Congestion or weather maybe?
don From Japan, joined Jun 2003, 274 posts, RR: 0
Reply 4, posted (3 years 7 months 1 week 1 day 11 hours ago) and read 7708 times:
From what I have heard, routing between Far east and Europe is a balancing act. Airlines would like to fly on the northern route for shorter great circle distance as well as for lesser headwinds. But Russian air navigation fees for that route is very expensive. So the daily route planners weigh the fuel cost of the southern route versus the extra navigation fees when determining the optimum route. But other factors such as weather and air space closures will come into equation as well.
planesarecool From United Kingdom, joined Nov 2001, 4124 posts, RR: 11
Reply 5, posted (3 years 7 months 1 week 1 day 10 hours ago) and read 7657 times:
Quoting CXfirst (Reply 3): If you see on your own link, CAL069 is coming in from an even more Northerly route, and that is from TPE!!!!
If I'm not mistaken, this flight isn't allowed to overfly China. It usually takes a more southerly route over India and the Middle East, obviously favourable winds in the North (or more likely, unfavourable headwinds winds in the South) have led them taking the Northerly route around China.
SunriseValley From Canada, joined Jul 2004, 5507 posts, RR: 5
Reply 8, posted (3 years 7 months 1 week 1 day 8 hours ago) and read 6785 times:
Quoting VV701 (Reply 7): An aircraft flying the shortest (great circle) route between LHR and NRT directly overflies MMN. So if everything else is equal it will be the preferred routing. The map here illustrates this:
The airways over China and Russia jog around quite a lot so a GC track distance is likely less than the airways distance.
willzzz88 From United States of America, joined May 2011, 150 posts, RR: 0
Reply 11, posted (3 years 7 months 1 week 1 day 2 hours ago) and read 4025 times:
That's not even that high.
You want high and constant costs!?
Try the North American and Asian carriers flying transpolar from Canadian airspace to Russian airspace to the Middle East/South Asia and mostly East Asia.
JFK/EWR-PEK/PVG/HKG crossing more than 80*N EVERY DAY!
Essentially the Americans, Canadians, Russian, Japanese, Chinese and Europeans figured out that flying higher saves more fuel but the airspace cost is $$$ over the Russian airspace (they make profit on this $$$) but I hear it may be reduced due to recent trans-polar meetings with all the parties and system upgrades on the Russian side (Specifically Nov. 17 RVSM in Russia & Central Asia).
Once RVSM is implemented I believe there will be more efficient routing from East/South Asia to Europe via Russia/Central Asia.