Garmin GNC 420W Pilots Guide - Page 195

SECTION 11 ADDITIONAL FEATURES Altitude Deviation Traffic Type Altitude Trend Traffic Ground Track Vector Figure 11-4 Traffic Symbol Components Traffic Type Description Traffic This symbol (solid yellow circle) is generated Advisory (TA) when an intruder aircraft approaches on a course that projects to intercept (defined by a 0.5 nm horizontal radius and a relative altitude of ± 500 ft) the pilot's current course within 34 seconds. Out-of- This solid yellow half circle appears under Range Traffic the same conditions and has the same Advisory urgency as a TA. Its appearance differs from the TA only to signify that the intruder is outside of the current range of the Traffic Page. Other Traffic Symbol This symbol (hollow white diamond) represents traffic detected within the selected display range that does not meet the criteria for a TA. (May be configured as cyan). Traffic The target track vector is a short line Ground Track displayed in 45° increments. The vector protrudes from each target symbol in the approximate direction of travel. Table 11-2 TIS Options Traffic Page TIS Traffic data is displayed on the Traffic Page (Figure 11-5) and the Map Page. Unlike other forms of traffic, TIS traffic does not require heading data to be valid on the map. If heading is available the Traffic Page is displayed in heading-up orientation. If it is not available, the Traffic Page is track-up oriented. Orientation is shown in the upper portion of the Traffic Page. Heading or Track Up Indicator Figure 11-5 Traffic Page TIS Traffic Display Status and Pilot Response • AGE - If traffic data is not refreshed within 6 seconds, an age indicator (e.g., 'AGE 00:12') is displayed in the lower right corner of the display (when displaying traffic). See Figure 11-6. The pilot should be aware that the quality of displayed traffic is reduced in this condition. After another 6 seconds, if data is still not received, the traffic is removed from the display. Traffic Coasting Banner and Age Indicator Figure 11-6 Traffic Age Indicator and Coasting Banner 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 11-5