Which system provides altitude awareness within RVSM?

• A. Altitude Alert System
• B. Terrain Awareness System
• C. Weather Radar
• D. Collision Avoidance System

Answer: (A)

In RVSM, knowing exactly where you are in the vertical profile is essential, because the required vertical separation is very precise. The Altitude Alert System is designed to monitor the aircraft’s current altitude against the assigned altitude and warn when there’s a deviation beyond the preset limit. This keeps the crew continuously aware of how close they are to their cleared flight level and prompts quick corrective action to stay within the RVSM tolerance. Other systems serve different safety roles—terrain awareness helps avoid terrain, weather radar shows precipitation, and collision avoidance provides traffic separation—but they don’t provide ongoing altitude awareness relative to an assigned flight level like the Altitude Alert System does.