Definition
A stored collection of navigation data inside a GPS receiver containing airports, runways, navaids, waypoints, airways, arrival and departure procedures, instrument approaches, and airspace information. The database is published on a fixed cycle (typically every 28 days) and must be current for IFR operations that rely on it.
Plain English
It is the GPS unit's built-in catalogue of places, routes, and procedures. When you select an airport or approach, the GPS is reading from this stored list. The list gets replaced regularly so it stays accurate.
Context Anchor
Seen when loading a flight plan, selecting an airport or waypoint, or using an instrument procedure in a panel-mounted or approved portable GPS.
Derivation
Navigation comes from older words meaning to guide or steer a ship. Database means an organized store of information. Together, the term points to stored information that helps the GPS guide the aircraft.
Why Pilots Care
An outdated or incorrect database can direct the aircraft to the wrong location or a closed runway, creating a safety risk.
Analogy
It is like the address book inside your phone’s map app: the receiver can find and guide you to places because their information is already stored inside it.
Intuition Check
Do not think of the GPS navigation database as the GPS signal itself. The signal helps the unit know position; the database tells the unit what aviation places, routes, and procedures mean.
Example Sentence 1
Before the IFR flight, the pilot confirmed the GPS navigation database was current by checking the expiration date on the startup page.
Example Sentence 2
During the instrument approach briefing, the crew confirmed the GPS navigation database contained the latest procedure changes.