Garmin GNC 420W Pilots Guide - Page 184

SECTION 10 TERRAIN 10.3 TERRAIN Alerts TERRAIN Alerts are issued when flight conditions meet parameters that are set within TERRAIN software algorithms. TERRAIN alerts typically employ either an ADVISORY or a CAUTION alert severity level, or both. When an alert is issued, visual annunciations are displayed. Annunciations appear in a dedicated field in the lower left corner of the display (Figure 10-2). Annunciations are color-coded according to Table 10-2. TERRAIN Annunciation Pop-up terrain alerts (Figure 10-3 & 10-4) can also appear during an alert, but only when the TERRAIN Page is not displayed. There are two options when an alert is displayed: • Press the CLR Key. This acknowledges the pop-up alert and returns to the currently viewed page. • Press the ENT Key. This acknowledges the pop-up alert and accesses the TERRAIN Page. Figure 10-2 TERRAIN Annunciation Field NOTE: TERRAIN Advisory Alerts are displayed as constant black text on a yellow background; TERRAIN Caution Alerts are displayed as flashing black text on a yellow background. Figure 10-3 TERRAIN Advisory Pop-up Figure 10-4 TERRAIN Caution Pop-up (Flashing) 10-4 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K