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← HistoryWhich navigation error occurs when chronometer's spring weakens in 18th century maritime navigation?
A)Underestimated longitude during westward voyages✓
B)Overestimated latitude during daytime sightings
C)Underestimated current speed, leading to grounding
D)Inaccurate celestial height, affecting position accuracy
💡 Explanation
When the chronometer's spring weakens, its oscillation rate slows, leading to accumulated time lag during a long voyage, especially westward because time lags appear additive moving west. Therefore longitude is underestimated, rather than changing latitude or current/height calculations, which depend on geographical features/angles.
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