ren41
Posts: 1456
Joined: Mon Jan 08, 2001 3:24 am

Oceanic Clearance At Boston Center (vs Gander)

Wed Jan 13, 2010 5:17 am

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?
 
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Starlionblue
Posts: 17208
Joined: Fri Feb 27, 2004 9:54 pm

RE: Oceanic Clearance At Boston Center (vs Gander)

Wed Jan 13, 2010 5:49 am



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." - John Ringo
 
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LAXintl
Posts: 20475
Joined: Wed May 24, 2000 12:12 pm

RE: Oceanic Clearance At Boston Center (vs Gander)

Wed Jan 13, 2010 6:37 am

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
 
Mir
Posts: 19108
Joined: Mon Jan 05, 2004 3:55 am

RE: Oceanic Clearance At Boston Center (vs Gander)

Wed Jan 13, 2010 7:29 am



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
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