Terrain Clearance Floor alerts are provided only for the destination airport as determined by the FMS.

Terrain Clearance Floor alerts are provided only for the destination airport as determined by the FMS.

• A. False
• B. True
• C. Not sure
• D. Not applicable

Answer: (A)

Terrain clearance floor alerts are not limited to the destination airport. They’re calculated from the entire active flight path—the route the FMS is guiding you along—and the terrain data along that path. The system continually assesses terrain ahead on en-route segments and during approach, comparing it to the aircraft’s altitude. If the aircraft would come within the defined floor of terrain anywhere along the route, an alert is issued. So you can get TCF alerts before reaching the destination if terrain closer than your safe altitude exists along the route, not just at the destination itself.

Terrain clearance floor alerts are not limited to the destination airport. They’re calculated from the entire active flight path—the route the FMS is guiding you along—and the terrain data along that path. The system continually assesses terrain ahead on en-route segments and during approach, comparing it to the aircraft’s altitude. If the aircraft would come within the defined floor of terrain anywhere along the route, an alert is issued. So you can get TCF alerts before reaching the destination if terrain closer than your safe altitude exists along the route, not just at the destination itself.