13Getting StartedStarting UpThe GNS 480 performs internal checks and shows the status of the tests during start up. The startup screen,owner name (if entered), testing, position, and database information shows on the screen for several secondsand then shows the first Map page. It is not generally necessary to enter a GPS seed position unless the unithas either been moved several hundred miles or been unused for six months or so with the power off. A seedposition should have been entered the first time the unit was turned on during installation.Power Up1. Push the PWR/VOL knob in to turn on power.2. When the position display appears, you can press CHG to manually enter your present position or justwait a few seconds for the GNS 480 to establish your position.3. The GNS 480 performs a number of tests at startup to ensure proper operation. You may press SKIP tobypass the startup tests, however, completing these tests is required for IFR flight. Any failures will benoted by a message.Set Fuel Full and ReserveIf a Fuel/Air Data Computer is installed, Fuel Full and Fuel Reserve amounts are entered manually in the Con-figuration page of System mode and are reflected in the start-up screens. On start-up, you will be prompted forthe Total Fuel on Board.Press the Menu/Enter key to accept the displayed amount of fuel or change the displayed amount with theSmall knob and then press the Menu/Enter key.Self-TestsThe GNS 480 performs internal checks and shows the status of the tests during start up. After these internalchecks, the GNS 480 is ready to navigate.Database CheckThe GNS 480 verifies the integrity and expiration date of the database. Up to two database cycles are sup-ported. The GNS 480 will load the appropriate current database cycle and also let you know if a database isnot current (dates invalid).Start-Up DisplayDatabase Verification
