Garmin HTAWS User Guide - Page 45

Part Three: Section 3 TAWS Alerts WARNING- Estimated potential impact in approximately 15 seconds after a FLTA warning pop-up alert. FLTA warning pop-up alerts are accompanied by the aural message "Terrain, Terrain; Pull Up, Pull Up" or "Terrain Ahead, Pull Up; Terrain Ahead, Pull Up". Similarly, a "Obstacle, Obstacle; Pull Up, Pull Up" or "Obstacle Ahead, Pull Up; Obstacle Ahead, Pull Up" alert is also provided. The time to an alert can vary with conditions, therefore there is no guarantee of a 15 second warning alert being issued. Phase of Flight Level Flight Descending En Route 700 ft. 500 ft. Terminal 350 ft. 300 ft. Approach 150 ft. 100 ft. Departure 100 ft. 100 ft. Minimum TERRAIN Clearance Values for FLTA Alerts NOTE: During the final approach phase of flight, FLTA alerts are automatically inhibited when the aircraft is below 200 feet AGL while within 0.5 NM of the approach runway or is below 125 feet AGL while within 1.0 NM of the runway. Premature Descent Alerting (PDA) The TAWS system issues a Premature Descent Alert (PDA) when the system detects that the aircraft is significantly below the normal approach path to a runway. PDA begins when the aircraft is within 15 NM of the destination airport. PDA ends when the aircraft is either: • 0.5 NM from the runway threshold OR • is below an altitude of 125 feet AGL while within 1.0 NM of the threshold. (EIGHT!BOVE4ERRAIN&EET       0$!!LERTING!REA  2UN WAY 4HRESHOLD $ISTANCE&ROM$ESTINATION!IRPORTNM CAUTION - The above annunciation and pop-up terrain alert are displayed during a PDA alert. For TAWS, the PDA alert is accompanied by the aural message "Too Low, Terrain". 190-00356-30 Rev H 39