Definition
An electronic database loaded into an aircraft's navigation system (such as a GPS or FMS) that contains the coded information needed to fly published routes and procedures. It includes waypoints, airways, airports, runways, navaids, standard instrument departures (SIDs), standard terminal arrivals (STARs), and instrument approach procedures. The database is published on a fixed update cycle and must be current for many IFR operations.
Plain English
A digital library inside the aircraft's navigation equipment that holds all the published flight information — points, routes, airports, and procedures — that the system uses to navigate.
Context Anchor
Seen when using GPS or area-navigation equipment to load a route or procedure, and during the RNAV accuracy check before relying on that guidance.
Derivation
Navigation comes from older words connected with guiding a ship or vehicle along a route. Database simply means an organized store of data. Together, the term means the stored information the aircraft uses to guide navigation.
Why Pilots Care
Ensures accurate positioning and procedure execution; an outdated database can cause navigation errors or regulatory non-compliance.
Intuition Check
Do not think of the navigation database as the satellite signal or the screen map itself. It is the stored aviation information the navigator reads from to create the guidance you see.
Example Sentence 1
Before departure, the pilot confirmed the navigation database was current so the RNAV approach could be loaded directly from it.
Example Sentence 2
During the RNAV accuracy check, the pilot confirmed that the navigation database matched the published procedure data.