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How many types of variations in declination are there?(a) 4(b) 5(c) 2(d) 3I have been asked this question by my college director while I was bunking the class.Question is from Compass Surveying topic in portion Basic Surveying of Basic Civil Engineering

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Right OPTION is (a) 4

To ELABORATE: The four types are DIURNAL (daily), ANNUAL (yearly), secular (PERIODIC) and irregular variations.



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