Tanks, armor, and other tanks have more iron and electromagnetic systems. Usually the compass will be affected and it will be difficult to function. If the gyroscope's high-speed shaft is placed in the north-south direction when the vehicle starts to travel, then due to the gyroscope Fixed axis, no matter how the body rotates, the gyroscope's high-speed rotation axis will stably point to the local north-south direction during the vehicle's travel. The angle between the longitudinal axis of the vehicle and the high-speed rotation axis of the gyroscope is the heading angle, according to its size. The direction can be determined and the progress of the vehicle can be controlled by an electronic system. The former Soviet Union first installed gyroscopes on the launch vehicles of self-propelled anti-aircraft guns and Sam missiles.
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