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________ is a term used that prevents the needle from pointing to the magnetic North in a given locality.

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in Basic Civil Engineering by (111k points)
________ is a term used that prevents the needle from pointing to the magnetic North in a given locality.

(a) Local attraction

(b) Declination

(c) Deviation

(d) Local distraction

This question was addressed to me during an interview.

This intriguing question comes from Compass Surveying topic in portion Basic Surveying of Basic Civil Engineering

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Right option is (a) Local attraction

To elaborate: While reading a compass, sometimes needle might be slightly deviated from magnetic North. It can be due to any weather conditions, magnetic objects nearby. It has to be corrected to get accurate readings.

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