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← HistoryWhich consequence arises when poor index mirror calibration affects repeated sextant measurements?
A)Cumulative systematic angular error✓
B)Random observational error increase
C)Compensating latitudinal position fix
D)Decreased celestial body visibility
💡 Explanation
Systematic error accumulates because a misaligned index mirror creates a constant bias in every angle measurement, leading to increasing position inaccuracies; therefore cumulative systematic angular error occurs, rather than random error which is unsystematic, and calibration should minimise bias.
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