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Which navigational error increases when a sailing ship's chronometer experiences significant consistent rate drift?

A)Overestimated ocean current velocity
B)Underestimated magnetic variation
C)Longitudinal positioning inaccuracy
D)Latitudinal positioning inaccuracy

💡 Explanation

When the chronometer drifts significantly, the error in time measurement accumulates because it directly impacts the calculated Greenwich Mean Time (GMT) thereby affecting the deduced longitude. Therefore longitudinal inaccuracy rises, rather than current velocity or variation which are not time related factors, while latitude depends on celestial altitude measurements.

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