GWPS is an acronym for what?

• A. Ground Weather Positioning System
• B. Ground Proximity Warning System
• C. Guided Waypoint Positioning System
• D. Gyro Wheel Position Sensor

Answer: (B)

This item tests your familiarity with aviation safety systems and their acronyms. The system that warns pilots about terrain or obstacles ahead is designed to prevent controlled flight into terrain by providing alerts when the aircraft is too close to the ground or descending too rapidly. Ground Proximity Warning System is the standard term for this safety feature, often referred to as GPWS, and it uses data like altitude, descent rate, and flight path to trigger warnings such as “Pull Up” or “Terrain, Terrain.” Modern aircraft may use Enhanced GPWS (EGPWS), which adds a terrain database and look-ahead warnings.

The other options describe different concepts: a Ground Weather Positioning System isn’t a recognized avionics term for terrain warnings; a Guided Waypoint Positioning System relates to navigation by waypoints rather than terrain safety; and a Gyro Wheel Position Sensor isn’t a standard system used for terrain awareness. So the correct understanding is that GWPS stands for Ground Proximity Warning System.