Method for elaboration of a navigation phase in a navigation system involving a terrain correlation.

The present invention relates to a method for preparing a navigation phase of a wearer, in a navigation system involving a terrain correlation, the method determining a navigation map in which each point of interest in a embedded board (12) is associated with an airworthiness score. The invention has the advantage of being applicable to all terrain correlation navigation techniques, and allow consideration of the quality of embedded boards and field sensors used.