Garmin GNC 420W Pilots Guide - Page 197

SECTION 11 ADDITIONAL FEATURES Figure 11-11 Traffic Removed Banner Figure 11-13 Traffic Warning Window • UNAVAIL - When a 60 second period elapses with no data, TIS is considered to be unavailable. This state is indicated by the text 'UNAVAIL' (Figure 11-12). The pilot should be aware that 'UNAVAIL' could indicate a TIS coverage limitation due to a line-of-sight situation, a low altitude condition, or a result of flying directly over the radar site providing coverage (cone of silence). NOTE: The Traffic Warning Window is disabled when the aircraft ground speed is less than 30 knots or when an approach is active. Non-Bearing Traffic Advisory (TA) Banner Traffic is only displayed graphically if aircraft heading data is available. When heading is not available, Traffic Advisories are displayed as non-bearing banners. The banner shown in Figure 11-14 consists of (left to right): Figure 11-12 'UNAVAIL' Message Traffic Warning Window When the unit is on any page (other than the NAV Traffic Page) and a traffic threat is imminent, the Traffic Warning Window is displayed (Figure 11-13). The Traffic Warning Window shows a small thumbnail map which can take the user to the Traffic Page by pressing the ENT Key, or go back to the previous page by pressing the CLR Key. NonBearing Traffic Advisory Banner Figure 11-14 Non-Bearing TA Banner • The 'TA' annunciation. • The distance in miles '1.5', from the client aircraft's present position to the intruder aircraft. • A '+' or '-' symbol indicating whether the intruder aircraft is above (+) or below (-) the client aircraft. • The difference in altitude '04' (shown in hundreds of feet) between the intruder aircraft and the client aircraft. • An up or down arrow indicating that the intruder aircraft is climbing or descending at a rate greater than 500 fpm. 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 11-7