Definition
The information used by an aircraft's navigation systems to determine position, course, and guidance to a destination, including waypoint coordinates, airway routes, instrument procedures, navaid frequencies and locations, airport and runway data, and airspace boundaries. In modern avionics, this data is stored in an electronic database that is loaded into the flight management system or GPS receiver and updated on a regular cycle.
Plain English
The stored map and route information your aircraft's navigation computer uses to know where things are and how to get to them.
Context Anchor
Seen in electronic flight display malfunction discussions, especially when a display loses, misreads, or cannot show navigation information correctly.
Derivation
Navigation comes from older words meaning to guide or direct a ship. Data comes from Latin meaning things given. Together, navigation data means the given information used to guide movement from one place to another.
Why Pilots Care
Loss or corruption of navigation data during a display malfunction removes the primary source of position and guidance, forcing immediate transition to backup instruments or procedures to avoid loss of situational awareness.
Intuition Check
Do not read navigation data as every piece of information related to a trip. In this context, it means the specific information used by aircraft systems to show position, direction, route, and guidance.
Example Sentence 1
Before the flight, the pilot confirmed the navigation data in the GPS was current for the 28-day cycle.
Example Sentence 2
A sudden loss of navigation data during an instrument approach required the crew to revert to raw data and request radar vectors.