2-4 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1Get Started2.1 Database Effective CyclesMost databases expire at regular intervals. Exceptions include Basemap and Terrain,which neither expire nor update on a regular schedule.DATABASE NOT FOUNDNotifications for databases not present or available also display in the form of systemmessages.DATABASE EFFECTIVE STATUSDatabases withno effectivedate• Effective upon release• Transfer occurs prior to database verification at systemstart-up• No automatic transfer if Flight Stream 510 is present• Includes Basemap and Terrain• No pilot confirmation or restart requiredDatabases withspecifiedeffective dates• Effective during a specific period• Unit determines database status using the current dateand time from GPS• Automatic activation occurs on the effective dateThe start-up page lists all currentlyinstalled databases. Review this list forcurrent database types, cycle numbers,and expiration dates.Yellow text denotes when a database is:• Not available• Installed before its effective date• Missing date information• Past its expiration dateTapping Database Infoopens the Active DatabaseInformation page.Review this list to determinethe status of the indicateddatabase.
