Advanced Mine Survey Certificate Exam Practice Questions - Advanced Certificate In Mine Survey (South Africa) Exam

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When using a gyro-theodolite to determine an underground baseline bearing, which correction must be applied to convert the gyroscopic true north bearing to a South African LO grid bearing?

Meridian convergence correction Magnetic declination correction Grid scale factor amplification Diurnal polar motion drift

Correct Answer:

Meridian convergence correction

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