190-00498-01 Rev. A Garmin G1000 Pilot’s Guide for Cessna Nav III 2-25FLIGHT INSTRUMENTSWarnings are time-critical and require immediate pilot attention. A flashing WARNING Softkey annunciationand aural tone (single chime every two seconds) are used to alert the pilot of any warnings. The aural toneand flashing WARNING annunciator continue until acknowledged by the pilot (by pressing the WARNINGSoftkey).Caution indicates the existence of abnormal conditions on the aircraft that may require pilot intervention. Aflashing CAUTION Softkey annunciation and single aural tone (one chime) are used to alert the pilot of anycautions. The flashing CAUTION annunciator continues to flash until acknowledged by the pilot (by pressingthe CAUTION Softkey).An advisory provides general information to the pilot that may not need immediate attention. A flashingADVISORY Softkey annunciation (no aural tone) is used to alert the pilot of any message advisories. Theflashing ADVISORY annunciator continues to flash until acknowledged by the pilot (by pressing the ADVISORYSoftkey).Figure 2-36 Softkey Annunciation (ALERTS Softkey labels)ALTITUDE ALERTINGNOTE:Altitude Alerting is not available for the Cessna 172.The Altitude Alerting function provides the pilot with visual and aural alerts when approaching the SelectedAltitude. Whenever the Selected Altitude is changed, the Altitude Alerter is reset. The Altitude Alerter isindependent of the GFC 700 AFCS, but the function is present only when the AFCS is present.The following occurs when approach the Selected Altitude:• Upon passing through 1000 feet of the Selected Altitude, the Selected Altitude (shown above the Altimeter)changes to black text on a light blue background, flashes for five seconds, and an aural tone is generated.• When the aircraft passes within 200 ft of the Selected Altitude, the Selected Altitude changes to light blue texton a black background and flashes for five seconds.• After reaching the Selected Altitude, if the pilot flies outside the deviation band (±200 feet of the SelectedAltitude), the Selected Altitude changes to yellow text on a black background, flashes for five seconds, and anaural tone is generated.Within 1000 ft Within 200 ft Deviation of ±200 ftFigure 2-37 Altitude Alerting Visual Annunciations