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Oceanic Clearance At Boston Center (vs Gander)  
User currently offlineRen41 From United States of America, joined Jan 2001, 1524 posts, RR: 1
Posted (4 years 8 months 1 week 3 days 15 hours ago) and read 4444 times:

Recently I have noticed that aircrafts crossing the Atlantic have been using a much more southerly route. Normally most flights seem to hug the coast before crossing around Gander, but now many flights are crossing around Boston. Have there been adjustments with the NAT's?

Southerly route via ACK
http://flightaware.com/live/flight/UAL928
vs.
http://flightaware.com/live/flight/BAW24R

Also, are the NAT's adjusted frequently or are their routes fairly consistent over long periods of time?

3 replies: All unread, jump to last
 
User currently offlineStarlionblue From Greenland, joined Feb 2004, 17040 posts, RR: 66
Reply 1, posted (4 years 8 months 1 week 3 days 15 hours ago) and read 4432 times:



Quoting Ren41 (Thread starter):
Also, are the NAT's adjusted frequently or are their routes fairly consistent over long periods of time?

As I understand it they are adjusted quite frequently based on conditions. I seem to remember something about weekly. Then again I have a fever so I could be delirious.



"There are no stupid questions, but there are a lot of inquisitive idiots."
User currently offlineLAXintl From United States of America, joined May 2000, 25388 posts, RR: 49
Reply 2, posted (4 years 8 months 1 week 3 days 14 hours ago) and read 4420 times:

The North Atlantic Track structure is revised daily.

An optimal route is developed daily between JFK-LHR and LHR-JFK with the remainder of the tracks are built to the north and south. (there is a fixed track down towards Florida that does not change)

The daily updated track advisory messages can be viewed courtesy of the FAA at;
https://pilotweb.nas.faa.gov/qryhtml/nat.html



From the desert to the sea, to all of Southern California
User currently offlineMir From United States of America, joined Jan 2004, 21634 posts, RR: 55
Reply 3, posted (4 years 8 months 1 week 3 days 13 hours ago) and read 4414 times:



Quoting Starlionblue (Reply 1):
As I understand it they are adjusted quite frequently based on conditions. I seem to remember something about weekly.

How about daily?

They're based on the winds, trying to minimize flight times. That means trying to stay in the winds as much as possible going east, and avoid them as much as possible going west.

-Mir



7 billion, one nation, imagination...it's a beautiful day
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