The rate gyro tells the pilot when he is starting to turn to the left or right, and about how fast. The horizon indicator, or gyro vertical, indicates the horizon without the pilot's having to look at the ground. When this is incorporated into the automatic pilot, it holds the airplane in a proper flight attitude. The directional gyro tells in what direction the aircraft is heading. Gyroscopic instruments are used also in bomb sights, gunfire control systems, antiaircraft systems, and in the automatic pilots of guided missiles and long-range rockets.
Gyroscopes are also an essential part of spaceships.
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