BigSaabowski From United States of America, joined Jul 2008, 192 posts, RR: 0
Reply 1, posted (3 years 10 months 1 day 18 hours ago) and read 2662 times:
This was not a climb clearance but an oceanic track entry clearance. The aircraft was most likely already at FL340. This is how controllers sequence aircraft on the tracks. The next aircraft to enter the track starting at PIKIL at the same altitude, would be given a "no earlier time" of 1658z.
David L From United Kingdom, joined May 1999, 9643 posts, RR: 42
Reply 2, posted (3 years 10 months 1 day 18 hours ago) and read 2656 times:
I think the point is that they were not to enter Oceanic airspace before 1648z and that they were to be already level at FL340 prior to doing so.
Due to the lack of radar coverage, the North Atlantic movements are "choreographed" to ensure spacing. That's why they are issued fixed flight levels, Mach numbers and entry times. Being out of sight of ATC for several hours, you don't want them bunching up along the way.
aloges From Germany, joined Jan 2006, 9409 posts, RR: 39
Reply 3, posted (3 years 10 months 1 day 3 hours ago) and read 2435 times:
Speaking of the NATS, is there any way to find out which Airbus overtook my flight (LH439, D-AIKI) during the night from last Sunday to Monday? The overtaking aircraft at approximately 22:05 CDT/03:05 GMT was to our right and somewhat lower, I got the idea that it was an Airbus from its strobes (double flash as opposed to a Boeing's single flash). The position was southeast of Greenland.
[Edited 2012-07-03 04:16:56]
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