The "XTE > # nm" notation in the terrain profile view indicates the Cross-Track Error is such that the aircraft's GPS position is outside the selected corridor width (more than half the selected corridor width value) relative to the active leg, whether airborne or stationary. This text indicates that the terrain clearance information shown in the profile does not apply to the current location.
If the GPS position is within half of the corridor width relative to the active leg, no XTE notation is displayed, meaning the terrain clearance information is accurate for the current position.
This feature helps ensure awareness of terrain clearance applicability based on the selected navigation corridor.
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