Guidance concerning Air Navigation in and above the NAT MNPSA
It should be noted that these routes are subject to occasional changes and are re-published/updated on a regular AIRAC 56-day cycle
US East Coast Transitions
Aircraft Operators are encouraged to refer to FAA Air Traffic Control System Command
Center Advisory Database (www.fly.faa.gov) for NAT Advisory Message, published daily, for specified transitions from select U.S. airports to the NAT Entry Points. Additionally, route advisories are published, as necessary, to address special route requirements eastbound and westbound through the New York Oceanic
Canadian Domestic Track Systems
Within Canada there are three track systems: the Northern Control Area tracks (NCAs), the
Southern Control Area tracks (SCAs) and the Northern Organised Track System (NOROTS); these provide links for NAT traffic operating between Europe and North America to central and western North American
Track procedures and details are published in Transport Canada’s Aeronautical Information
Manual (TC AIM). The co-ordinates of the NOROTS are published daily via NOTAM.
Routes between North America and the Caribbean area
An extensive network of routes linking points in the United States and Canada with
Bermuda, the Bahamas and the Caribbean area are defined in the New York OCA to the west of 60°W. This network has been known as the West Atlantic Route System (WATRS). Since 5 June 2008 the original WATRS airspace together with portions of the Miami Oceanic airspace and the San Juan FIR have been designated as “WATRS Plus Airspace”. 50NM lateral separation standards are employed here on the basis of RNP approval status. Details of these routes and associated procedures are contained in the United States
AIP. See the following web page for information on WATRS.
Irish/UK Domestic Route Structures
The UK AIP and AIP Ireland both specify the domestic routes to be used for westbound
NAT traffic, based upon entry points into oceanic airspace.
North Atlantic European Routing Scheme (NERS)
The NERS exists to provide an interface between NAT oceanic and European domestic
airspace. The scheme is similar in concept to the NARS which has been in use in North America by NAT traffic for many years. It consists of a numbered series of predetermined routes, designed to accommodate
eastbound traffic exiting the NAT en route to a number of major European airports.
The NERS valid for a particular day will be published in the NAT Track Message but will
only be used when the traffic density warrants their use. They are not expected to be published every day. Full details of all NER routings together with associated procedures are published in CFMU Route
Availabilty Document Annex NAT:
NAT Doc 007