An instrument having a heavy gyroscope whose axis spins in a vertical plane to reduce the side-to-side rolling of a ship or aircraft.

• 回转稳定器一种稳定器具，由一个粗重的回转仪构成，回转仪的轴在垂直的平面内旋转，这样可以减轻船只或飞机两侧的晃动