Gyrotheodolite

A Wild GAK gyroscope mounted on a Wild T-16 theodolite.

A gyro-theodolite is a surveying instrument composed of a gyroscope mounted to a theodolite. It is used to determine the orientation of true north. It is the main instrument for orientation in mine surveying and in tunnel engineering, where astronomical star sights are not visible.

单词	Gyro theodolite
释义	Gyro theodolite 英语百科 Gyrotheodolite A gyro-theodolite is a surveying instrument composed of a gyroscope mounted to a theodolite. It is used to determine the orientation of true north. It is the main instrument for orientation in mine surveying and in tunnel engineering, where astronomical star sights are not visible.
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Gyro theodolite

Gyrotheodolite