Thanks for the info. I found this chart in the Canada AIP (
RAC - 11.0 NORTH ATLANTIC OPERATIONS) which cleared everything up for me. Particularly in the "Notes" section below.
We use GDC for our planning/filing.
Again, thanks for the insight.
fly-dad
FL430 May be flight planned for both eastbound and westbound non-RVSM certified aircraft – 24 hours a day
FL410 Eastbound flight level –
24 hours per day
FL400 Westbound flight level – except within eastbound OTS
FL390 Eastbound flight level – except within westbound OTS
FL380* Westbound flight level – except within eastbound OTS
FL370 Eastbound flight level – except within westbound OTS
FL360*Westbound flight level – except within eastbound OTS
FL350* Eastbound flight level – except within westbound OTS
FL340 Westbound flight level – except within eastbound OTS
FL330* Eastbound flight level – except within westbound OTS
FL320* Westbound flight level – except within eastbound OTS
FL310* Eastbound flight level – except within westbound OTS
FL300 Westbound flight level –
24 hours per day
FL290 and below Even levels westbound – 24 hours per day Odd levels eastbound – 24 hours per day
NOTES 1: Flight Level*: Shanwick/Gander may exchange on a tactical basis during OTS periods. 2: OTS Times: Eastbound – 0100 to 0800 UTC, Westbound – 1130 to 1800 UTC. Times are UTC at 30˚ West. 3: For operations outside of OTS times and/or the OTS structure, flight plan levels in accordance with the above flight allocation scheme.