Which error arises when using a sextant with index error during celestial navigation to determine ship's position?

💡 Explanation

When a sextant has index error, a systematic angular offset is present because the mirrors are not perfectly aligned, causing an error in the measured altitude of celestial bodies, ultimately affecting positional calculations. Therefore, celestial altitude measurements are inaccurate, rather than timing, compass, or magnitude errors which require alternate mechanisms.

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