Soar to New Heights with the 2025 Commercial Pilot License (CPL) Practice Exam – Ready for Takeoff!

The turn coordinator is an essential instrument in an aircraft that provides specific information about the aircraft's movement, particularly regarding its yaw and roll. It is designed to indicate how the aircraft is turning, which helps pilots maintain a coordinated turn. This instrument measures the aircraft's rotation about its vertical axis (yaw) and its bank angle (roll) around its longitudinal axis.

When the turn coordinator shows a standard rate turn, it indicates that the aircraft is turning at a consistent and controlled rate—approximately 3 degrees per second. A properly coordinated turn is crucial for ensuring passenger comfort and for maintaining aircraft control during maneuvers. The turn coordinator's capabilities make it a key instrument for pilots, especially in conditions where visual cues may be limited.

While other choices mention altitude and speed, wind direction, and visual flight rules, these aspects are not functions of the turn coordinator. Instead, they are covered by other instruments or methods within the cockpit that provide broader situational awareness. Thus, the correct choice highlights the specialized role of the turn coordinator in demonstrating specific rotational movements of the aircraft.