Which type of safety alert indicates a potential terrain or obstruction hazard at low altitude?

• A. Terrain/Obstruction Alert (Low Alt. Alert)
• B. Aircraft Conflict/Mode C Intruder Alert (Traffic Alert)
• C. Weather Advisory
• D. Runway Incursion Alert

Answer: (A)

Terrain and obstacle hazards at low altitude are detected by the Terrain/Obstruction Alert (Low Altitude). This alert is specifically designed to warn when there’s a potential terrain or obstruction near the flight path at low altitude, prompting prompt corrective action to avoid collision with terrain or obstacles. The other alerts address different situations: a Traffic Alert warns of possible conflicts with other aircraft, a Weather Advisory signals significant weather conditions, and a Runway Incursion Alert flags unauthorized activity on the runway. For a potential terrain or obstruction hazard at low altitude, the Terrain/Obstruction Alert (Low Altitude) is the appropriate alert.