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4.1.13 For turbojet aircraft the Mach Number planned to be used for each portion of the flight in the
NAT Region should be specified in Item 15 of the flight plan.
4.1.14 Item 15 of the flight plan should reflect the proposed speeds in the following sequence:
a) cruising True Airspeed (TAS);
b) oceanic entry point and cruising Mach Number;
c) oceanic landfall and cruising TAS.
4.2 FLIGHT PLANNING REQUIREMENTS ON SPECIFIC ROUTES
Flights Planning on the Organised Track System
4.2.1 If (and only if) the flight is planned to operate along the entire length of one of the
organised tracks, from oceanic entry point to oceanic exit point, as detailed in the NAT Track Message,
should the intended organised track be defined in Item 15 of the flight plan using the abbreviation 'NAT'
followed by the code letter assigned to the track.
4.2.2 Flights wishing to join or leave an organised track at some intermediate point are considered
to be random route aircraft and full route details must be specified in the flight plan. The track letter must
not be used to abbreviate any portion of the route in these circumstances.
4.2.3 The planned Mach Number and flight level for the organised track should be specified at
either the last domestic reporting point prior to oceanic airspace entry or the organised track commencement
point.
4.2.4 Each point at which a change of Mach Number or flight level is planned must be specified
by geographical co-ordinates in latitude and longitude or as a named waypoint.
4.2.5 For flights operating along the whole length of one of the organised tracks, estimates are
only required for the commencement point of the track.
Flights Planning on Random Route Segments in a Generally Eastbound or Westbound Direction at/or South
of 70°N
4.2.6 The requested Mach Number and flight level should be specified at either the last domestic
reporting point prior to oceanic airspace entry or the OCA boundary.
NORTH ATLANTIC MNPSA OPERATIONS MANUAL CHAPTER 4
NAT MNPS 20 Edition 2009
4.2.7 The route of flight should be specified in terms of the following significant points, with
estimates included in Item 18 of the flight plan:
a) the last domestic reporting point prior to the oceanic entry point;
b) the OCA boundary entry point (only required by the Gander, Shanwick, New York and
Santa Maria OACs);
c) significant points formed by the intersection of half or whole degrees of latitude, with
meridians spaced at intervals of ten degrees of longitude from the Zero degree E/W
(Greenwich) Meridian to longitude 70°W;
d) the OCA boundary exit point (only required by the Gander, Shanwick, New York and Santa
Maria OACs); and
e) the first domestic reporting point after ocean exit.
4.2.8 Each point at which a change of Mach Number or flight level is requested must be specified
and followed in each case by the next significant point.
Flights Planning on a Generally Eastbound or Westbound Direction on Random Route Segments North of
70°N
4.2.9 Flight planning requirements for flights in this category are identical to those listed for
flights on random route segments at/or south of 70°N except that a route should be specified in terms of
significant points formed by the intersection of parallels of latitude expressed in degrees and minutes with
meridians normally spaced at intervals of 20° from the Zero degree E/W (Greenwich ) Meridian to longitude
60°W, using the longitudes 000W, 020W, 040W and 060W.
Flights Planning on Random Routes in a Generally Northbound or Southbound Direction
Note : The ICAO Regional Supplementary Procedures for the NAT Region (Doc.7030) state that
flights operating between North America and Europe shall generally be considered as operating in
a predominantly east-west direction. However, flights planned between these two continents via the
North Pole shall be considered as operating in a predominantly north-south direction.
4.2.10 Flight planning requirements for flights in this category are identical to those listed for
flights operating on random route segments at/or south of 70°N except that the route should be specified in
terms of significant points formed by the intersection of whole degrees of longitude with specified parallels
of latitude which are spaced at 5° intervals from 20°N to 90°N.
Flights Planning to Enter or Leave the NAT Region via the European or North American Regions
4.2.11 To provide for the safe and efficient management of flights to/from the NAT Region,
transition route systems/schemes are established in the NAM and EUR Regions (NARs and NERs,
respectively). These schemes detail particular domestic routings associated with each oceanic entry or
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