"Jose" wrote ..
I videotaped this from the port side of a KLM 747-400 last october, en
route from Amsterdam to Toronto, south of Greenland...

Not a close call at all. Looks like several thousand feet of vertical
separation.


I would agree. The B747 has a wingspan of 211 feet, and if I understand
correctly the minimum vertical separation at cruise levels is 2000 feet or
nine wingspans (1000 feet with RSVM). The KLM seems to be farther away.

Beautiful video clip, by the way!