Which measurement inaccuracy increases substantially when an astrolabe's mater becomes warped unevenly?

💡 Explanation

Inaccurate altitude calculation arises because deviation from flatness in the astrolabe mater disrupts the precise angular relationships established during manufacture, therefore rendering vertical angle measurements unreliable, rather than calculations of time or azimuth which depend less heavily on mater's geometry.

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• Which outcome arises in medieval astrolabes lacking precise pinhole alignment?
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