Nat doc 001 Guidance and Information Material Concerning

Presentation of Navigation Information

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icao nat doc 001 air navigation north atlantic

3.14
Presentation of Navigation Information
3.14.1 A significant proportion of navigation errors result from the use of incorrect data. To minimize the problem, source data must be clearly legible under the worst cockpit lighting conditions and presented in a format suitable for error-free use in the cockpit environment. In this context, the following considerations apply a) on navigation charts, all position coordinates, e.g. ramp position, ATC waypoints, radio navaid positions, etc, should ideally be printed in dark blue or black numerals against a white background. Where such coordinates would normally appear against a locally tinted background, they should be enclosed in a white box. Absolutely no information should be overprinted on top of position coordinates. In situations where groups of position coordinates must appear in close proximity to each other, the position to which each set of coordinates applies should be clearly indicated by means of a leader

3-10 North Atlantic Guidance Material

7
th
Edition
b) navigational documents, such as track messages or flight plans, should be double-spaced or "boxed, to minimize the possibility of line slippage when the information is read and cit is advisable to provide pilots with a simple plotting chart of suitable scale (1 inch equals
120 NM has been used successfully on NAT routes) in order to facilitate a visual presentation of the intended route that, otherwise, is defined only in terms of navigational coordinates.

North Atlantic Guidance Material
4-1 7
th
Edition

2002

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