What are the sensing elements of an auto system?

The correct answer identifies the key components of an autopilot system, which are crucial for maintaining stable flight, navigating, and ensuring safety. The sensing elements in an autopilot system include attitude sensors, directional and turning gyros, and an altitude sensor.

Attitude sensors measure the aircraft's orientation relative to the horizon, which is essential for understanding the aircraft's pitch and roll. Directional gyros provide information about the aircraft's heading, which helps in navigation. Turning gyros are responsible for detecting changes in the aircraft's orientation, allowing for precise control during maneuvers. Altitude sensors, often barometric, measure the aircraft's height above sea level or take-off point, contributing to the altitude maintenance function of the autopilot.

These elements work together to provide the necessary data for the autopilot system to function accurately, enabling the aircraft to maintain desired flight parameters without constant human intervention. Other alternatives, while they may involve various sensors, do not accurately capture the specific components necessary for an autopilot system's operation.