What is the primary function of GPS in aviation?

The primary function of GPS (Global Positioning System) in aviation is to determine precise position using satellites. GPS works by receiving signals from multiple satellites orbiting the Earth, which allows it to calculate an aircraft's precise location in three-dimensional space. This capability is essential for navigation, as it enables pilots to know their exact position over the ground, helping them navigate efficiently and accurately to their destinations.

While the other functions mentioned in the options may be important in the aviation environment, they do not represent the primary role of GPS. Weather updates, fuel consumption calculations, and communication relaying are typically handled by different systems and tools integrated into aircraft. GPS’s fundamental purpose is navigation, making it a vital component for flight safety and route planning.