Which instrument utilizes a gyroscopic device and is minimally affected by turbulence?

The heading indicator is the correct choice because it operates using a gyroscopic mechanism, which helps maintain a stable reference of the aircraft's orientation relative to the Earth's surface. The gyroscopic device allows the heading indicator to provide accurate readings of the aircraft’s direction, even in turbulent conditions. This stability is crucial, as it minimizes the influence of brief disturbances caused by turbulence on the instrument’s accuracy.

In contrast, the airspeed indicator is affected by changes in air density and pressure rather than being reliant on a gyroscopic mechanism, making it more susceptible to turbulence. The magnetic compass, while useful for navigation, can be impacted by magnetic variation and turbulence, which can cause errors in the reading. The term "gyroscope" typically refers to the device itself rather than an instrument that provides a specific reading, making it an incomplete answer in this context. Therefore, the heading indicator stands out as the instrument designed to remain stable and accurate in adverse conditions.