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Which 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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