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Which consequence occurs when index error increases with sextant use?

A)Cumulative navigational estimate deviations increase
B)Mirror silvering degrades faster later
C)Limb graduations become hard to read
D)Telescope optical power starts reducing

💡 Explanation

Cumulative navigation error increases because the increasing index error yields incorrect angular measurements via the **parallax effect** over time; therefore course estimations progressively deviate, rather than simply affecting the immediate readings, although that happens too.

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