Organized Tracks are more south tonight
1978 asks Are trans Atlantic flights which pass over Iceland normally controlled by "Reykjavik Center"? I would imagine these flights would normally be assigned a North Atlantic Track (NATs) and Icelandic control only goes up to a certain level?
The Organized Track System (OTS) is more south tonight. NAT Track S is the northern most OTS tonight and at 20W it is 53N. That's approximately 11 degrees of Latitude south of Iceland.
Outside of the OTS flights would be cleared on Random Routings as coordinated by the Air Navigation Service Providers (ANSPs) whose airspace will be traversed and the Pilots and their Operations. Cleared routes will comply with any NOTAMs.