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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.
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:
(1) the last domestic reporting point prior to the oceanic entry point;
(2) the OCA boundary entry point (only required by the Gander, Shanwick, New York and
Santa Maria OACs);
NORTH ATLANTIC MNPSA OPERATIONS MANUAL CHAPTER 4
NAT MNPS 20 Edition 2005
(3) 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;
(4) the OCA boundary exit point (only required by the Gander, Shanwick, New York and Santa
Maria OACs); and
(5) 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.
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 Operate Without HF Communications
4.2.11 The carriage of HF communications is mandatory for flight in the Shanwick OCA. Aircraft
with only functioning VHF communications equipment should plan their route outside the Shanwick OCA
and ensure that they remain within VHF coverage of appropriate ground stations throughout the flight.
Theoretical VHF coverage charts are included in ICAO NAT Doc 001. Such strict routing restriction may
not apply in all NAT Oceanic Control Areas. Some may permit the use of SATCOM Voice to substitute for
or supplement HF communications. Details of communication requirements by individual NAT ATS
Providers are published in State AIPs. However, it must also be recognised that the Safety Regulator of the
operator may impose its own operational limitations on SATCOM Voice usage. Any operator intending to
fly through NAT MNPS Airspace without fully functional HF communications should ensure that it will
meet the requirements of its State of Registry and those of all the relevant ATS Providers throughout the
proposed route.
NORTH ATLANTIC MNPSA OPERATIONS MANUAL CHAPTER 5
NAT MNPS 21 Edition 2005
Chapter 5: Oceanic ATC Clearances
5.1 GENERAL
5.1.1 Oceanic Clearances are required for all flights within NAT controlled Airspace (at or above
FL55). Pilots should request Oceanic Clearances from the ATC unit responsible for the first OCA within
which they wish to operate, following the procedures and the time-frame laid down in appropriate AIPs.
Such clearances, although in most cases obtained some time before reaching the Oceanic entry point, are
applicable only from that entry point. It is recommended that pilots should request their Oceanic Clearance
at least 40 minutes prior to the Oceanic entry point ETA and, if requesting an OTS track, should include the
next preferred alternative.
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