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← HistoryWhich consequence results when a navigator's sea sextant mirror degrades?
A)Rhumb line navigation is impossible
B)Observed angle measurements become inaccurate✓
C)Latitude calculations are only approximate
D)Celestial body identification becomes impossible
💡 Explanation
In 18th century navigation, mirror degradation leads to inaccurate angle measurements due to degraded reflectivity causing parallax errors, impacting the 'double reflection' principle used within the sextant. Therefore, positional accuracy falls, rather than fundamentally preventing navigation because corrections were attempted.
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