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Guidance concerning Air Navigation in and above the NAT MNPSA


  • CHU - National Research Council (NRC - Ottawa, Canada) - CHU operates continually H24 on 3330, 7335 and 14,670 kHz (SSB) and provides UTC (voice) once every minute (English even minutes, French odd minutes).

  • BBC - British Broadcasting Corporation (United Kingdom). The BBC transmits on a number of domestic and world-wide frequencies and transmits the Greenwich time signal (referenced to UTC) once every hour on most frequencies, although there are some exceptions.


Further details of these and other acceptable time references can be found in AIS

documentation of the NAT ATS Provider States. In general, the use of any other source of UTC, that can be shown to the State of the Operator or the State of Registry of the aircraft to be equivalent, may be allowed

for this purpose.

The Use of a Master Document


Navigation procedures must include the establishment of some form of master working

document to be used on the flight deck. This document may be based upon the flight plan, navigation log, or

other suitable document between each waypoint, mentioned subsequently

which lists sequentially the waypoints defining the route, the track and and other information relevant to navigation along the cleared track. in this guidance material, this document will be referred to as the

distance When 'Master



Misuse of the Master Document can result in GNEs occurring and for this reason strict

procedures regarding its use should be established. These procedures should include the following:

  • a)

    Only one Master Document is to be used on the flight deck. However, this does not preclude other crew members maintaining a separate flight log.

  • b)

    On INS equipped aircraft a waypoint numbering sequence should be established from the outset of the flight and entered on the Master Document. The identical numbering sequence should be used for storing waypoints in the navigation computers.

  • c)

    For aircraft equipped with FMS data bases, FMS generated or inserted waypoints should be carefully compared to Master Document waypoints and cross checked by both pilots.

  • d)

    An appropriate symbology should be adopted to indicate the status of each waypoint listed on the Master Document.

operator’s procedures may differ slightly but the same principles should be applied:


The waypoint number is entered against the relevant waypoint co-ordinates to indicate that the waypoint has been inserted into the navigation computers.


The waypoint number is circled, to signify that insertion of the correct co-ordinates in the navigation computers has been double-checked independently by another crew member.


The circled waypoint number is ticked, to signify that the relevant track and distance information has been double-checked.


The circled waypoint number is crossed out, to signify that the aircraft has overflown the waypoint concerned.


The following is a typical example of Master Document annotation.

An individual

NAT Doc 007


Edition 2010

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