6-4 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1Messages6.3 Database AdvisoriesADVISORY CONDITION CORRECTIVE ACTIONdatabase notavailable.The indicated databaseis unavailable or corrupt.Re-download and install theindicated database. Contact aGarmin dealer for support.Terrain displayunavailable forcurrent location.Terrain database cannotprovide elevation at thecurrent GPS position.Aircraft is outside thedatabase coverage area.Load appropriate coveragearea onto the externaldatacard.Verify user-modifiedprocedures instored flight plansare correct.Navigation databaseupdates and the storedflight plan containsuser-modifiedprocedures.Verify the procedures arecorrect.Verify airways instored flight planare correct.The stored flight plancontains an airway thatis inconsistent with thecurrent navigationdatabase.Verify all airways are correct.If necessary, reload airways tothe stored flight plan routes.A procedure hasbeen modified in acataloged flightplan.Database update causesflight plan to exceed100 waypoint limit.Procedure is removed ortruncated as a result.Verify cataloged flight planand procedures are correct. Ifnecessary, reload proceduresto the stored flight planroutes.Aircraft in area withlarge mag var.Verify all courseangles.Magnetic variationflagged as unreliable inthe MagVar database.Typically occurs whenoperating at highlatitudes that do notsupport a magnetic NAVangle.Verify that the geographicalregion supports navigationbased on magnetic variation.
