I notice in “Scheduled Departures – CYVR” that virtually every US-bound departure has two filed flight planes departing at the same time. One plan has an “unknown” Estimated Arrival Time. The second shows a time estimate.
I see that ASA632 to KLAX (5:00 departure) has two “unknown” EATs.
This phenomenon is quite obvious when you sort the [More] Scheduled Departure list by destination and all ‘K’ destinations are grouped together.