Which system is known for reducing pilot workload in modern aircraft?

Fly-by-wire systems are designed to significantly reduce pilot workload in modern aircraft. This technology replaces traditional mechanical flight control systems with electronic interfaces that allow pilots to control the aircraft's movements through computer systems. By using sensors, flight control computers, and actuators, fly-by-wire systems can automate many functions and enhance the precision of flight controls.

One major advantage of fly-by-wire technology is its ability to simplify the control process for pilots. It can also include safety features like envelope protection, which helps prevent the aircraft from exceeding operational limits, thereby allowing pilots to focus more on strategic decision-making and less on managing the mechanical aspects of flying.

In contrast, mechanical flight controls and manual flight controls require more direct input and effort from pilots, which can lead to increased workload, especially in complex flying situations. Hydraulic systems, while crucial for operation and control in many modern aircraft, primarily serve to power various aircraft systems and do not inherently reduce pilot workload in the way that fly-by-wire systems do.

Thus, fly-by-wire systems are key to enhancing operational efficiency and safety in today's aviation environment, making them the best choice for reducing pilot workload.