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← HistoryWhich accuracy risk dramatically decreased for 18th-century transoceanic navigation when the balance spring compensated chronometer improved practical timekeeping?
A)Celestial parallax calculation errors
B)Star magnitude misidentification risks
C)Longitude estimation using lunar distances✓
D)Magnetic declination variation unreliability
💡 Explanation
More precise chronometers enabled direct longitude calculation at sea using accurate time; determination of longitude via lunar distance (angular separation) calculation became obsolete because the chronometer's reliable time readings simplified calculations, rather than relying on celestial estimates.
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