Which instrument is used to monitor rate of turn and coordination and is part of the attitude instrument system?

• A. Airspeed indicator.
• B. Altimeter.
• C. Turn coordinator.
• D. Vertical speed indicator.

Answer: (C)

In the attitude instrument system, the instrument that monitors rate of turn and coordination is the turn coordinator. It uses a gyroscope set at a cant angle so it senses both yaw (turn rate) and roll, and it drives a miniature airplane figure to show how quickly you’re turning. The ball in the inclinometer underneath shows coordination—the centered ball means you’re not slipping or skidding. This is different from the other indicators: the airspeed indicator measures how fast you’re going, the altimeter shows your altitude, and the vertical speed indicator shows how fast you’re climbing or descending.