Garmin GTS 800 Pilots Guide - Page 9

GTS 8XX Interface equipped) indicates own altitude is less than 2000 feet AGL. If no radar altimeter is present, Sensitivity Level A is active when the landing gear is extended. Level A is also active when groundspeed is less than 120 knots with no radar altimeter present in a fixed gear aircraft. In all other conditions, Level B (greater sensitivity) TA sensitivity is used to assess TA threats. Sensitivity Level A A B B Intruder Altitude Available Yes No Yes No TA Alerting Conditions Intruder closing rate provides less than 20 seconds of vertical and horizontal separation. Or: Intruder range is within 0.2 nm and vertical separation is within 600 feet. Intruder closing rate is less than 15 seconds. Intruder closing rate provides less than 30 seconds of vertical and horizontal separation. Or: Intruder range is within 0.55 nm and vertical separation is within 800 feet. Intruder closing rate is less than 20 seconds. Table 2 TA Sensitivity Level and TA Alerting Criteria Target altitude relative to own aircraft altitude (relative altitude) is displayed (in hundreds of feet) for each target symbol (Figure 1). If traffic is above own aircraft altitude the relative altitude is shown above the target next to a '+' symbol. If traffic is below own aircraft altitude the relative altitude is shown below the target next to a '-' symbol. Altitude trend (Figure 1) is displayed as an up arrow (≥ +500 fpm), down arrow (≤ -500 fpm), or no symbol if less than 500 fpm rate in either direction. Relative Altitude Traffic Type Altitude Trend Figure 1 Traffic Symbol Components 190-00140-78 Rev. A 400/500 Pilot's Guide Addendum for GTS 8XX Interface 3