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Fiche 1,  Justifications,  Anglais

Record number: 1, Textual support number: 1 DEF

A navigation technique which makes use of the characteristics of the atmospheric pressure difference to obtain lines of position, drift or minimal flight path.  2, fiche 1, Anglais, - pressure%20pattern%20navigation

Record number: 1, Textual support number: 1 CONT

Inflight pressure pattern navigation was initiated in 1943 when readings of an aircraft's pressure and radar altimeters were first used to determine its so-called Bellamy Drift and/or pressure lines of position. This led to preflight planning of single-heading flights and optimum flight planning based on the patterns of the contours of constant-pressure upper-air charts.  3, fiche 1, Anglais, - pressure%20pattern%20navigation

Fiche 1,  Justifications,  Français

Fiche 1,  Justifications,  Espagnol