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Westbound Trans-atlantic Routing.  
User currently offlineDakotasport From Canada, joined Dec 2000, 232 posts, RR: 0
Posted (6 years 9 months 2 weeks 5 days 14 hours ago) and read 4177 times:

Hi everyone,

Why is it that some transatlantic flights track so far north when crossing the pond and some are more direct across the ocean. My flight SUF-SNN-YYZ went right up to the south of greenland when for example today's Alitalia's flight FCO-YYZ is straight across.


2 replies: All unread, jump to last
User currently offlineLowrider From United States of America, joined Jun 2004, 3220 posts, RR: 9
Reply 1, posted (6 years 9 months 2 weeks 5 days 11 hours ago) and read 4148 times:

Probably trying to get more favorable winds for the crossing. Also if the east bound tracks are active, it may have been the most favorable route available.

Proud OOTSK member
User currently offlineLongHauler From Canada, joined Mar 2004, 6053 posts, RR: 43
Reply 2, posted (6 years 9 months 2 weeks 4 days 19 hours ago) and read 4052 times:

If you are flying during normal flow times, namely eastbound in the evening/overnight, and westbound in the late morning/afternoon then the NAT tracks are arranged to best use ambient wind. Then dispatch, when building the flight plan and using the NAT tracks will go for the minimum time track.

However, if you are going "against the traffic" during off times when crossing the Atlantic, then you must either go under the NAT tracks or around them. It is never the optimum routing and the price one pays for flying during off hours.

In your example, either the winds drastically changed over a few day, (possible) or you (or Alitialia) was going against the traffic.

I encounter this during our morning YYZ-LHR flight, and late evening LHR-YYZ flight.

Just because I stopped arguing, doesn't mean I think you are right. It just means I gave up!
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