Which consequence arises from index error in a navigational sextant?

💡 Explanation

Inaccurate mirrors cause index error; because of the faulty reflection, angular measurements are skewed by systematic error, and thus result in imprecise angle measurement, rather than damage to the sextant, therefore navigational calculations would also be incorrect.

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• Which structural risk increased when Medieval Scottish masons narrowed aqueduct channels beyond Roman design?
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