What is one benefit of using a flight management system (FMS) in commercial aviation?

Using a flight management system (FMS) in commercial aviation significantly reduces pilot workload. An FMS integrates various systems and automates many tasks that pilots would otherwise have to manage manually, such as navigation, flight planning, and performance calculations. By automating these functions, pilots can focus on monitoring the aircraft's flight path and system status, which enhances safety and allows for better situational awareness.

The FMS helps streamline operations, particularly during complex phases of flight, such as transitions through different airspaces or during approach and landing. This reduced workload can lead to improved decision-making and task management, ultimately benefiting flight safety and efficiency.

In contrast, the other options do not accurately reflect the primary functions or benefits of an FMS. While it does not inherently increase cruising altitude, eliminate the need for air traffic control, or directly increase aircraft speed, its main advantage lies in its ability to assist pilots and improve operational efficiency.