Functional Requirements
RNAV specifications include requirements for certain navigation functions. These functional requirements include:
- continuous indication of aircraft position relative to track to be displayed to the pilot flying on a navigation display situated in his primary field of view;
- display of distance and bearing to the active (To) waypoint;
- display of ground speed or time to the active (To) waypoint;
- navigation data storage function; and
- appropriate failure indication of the RNAV system including its sensors.
Read more about this topic: Area Navigation
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