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Guidance concerning Air Navigation in and above the NAT MNPSA

CHAPTER 5

Waypoint Insertion Errors

5.7.3

Experience has shown that many of the track-keeping errors in the NAT MNPS Airspace

occur as a result of crews programming the navigation system(s) with incorrect waypoint data. These are

referred to as Waypoint Insertion Errors. They frequently originate from:

a)

failure to observe the principles of checking systems, against the ATC cleared route;

waypoints

to

be

inserted

in

the

navigation

    • b)

      failure to load waypoint information carefully; or

    • c)

      failure to cross-check on-board navigation systems.

      • 5.7.4

        More detailed guidance on this subject is contained in Chapter 8, Chapter 14 and Chapter 15

of this Document.

5.7.5

Many of the navigation error occurrences are the product of one or both of the foregoing

causes. It is therefore extremely important that pilots double check each element of the Oceanic Clearance on receipt, and at each waypoint, since failure to do so may result in inadvertent deviation from cleared route

and/or flight level.

NAT Doc 007

29

Edition 2010

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