Emergency offsetting in the NAT tracks
Years ago when I few the north atlantic, I believe the emergency procedure to descend withing the track structure was to acquire a distance of 30 nm offset. Now if I understand correctly, it has changed to 15 nm. Seeing as the tracks are still 60 miles apart, can anyone come up with the reason for making the distance 15 nm vice 30 nm?
Or, am I out to lunch on this?