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← HistoryWhich navigational challenge did 18th-century mariners primarily address using the method of lunar distances?
A)Calculating longitude at sea✓
B)Measuring ship's speed accurately
C)Determining latitude from Polaris
D)Mapping ocean currents precisely
💡 Explanation
Lunar distances involved measuring the angular separation between the moon and other celestial bodies, allowing calculation of Greenwich Mean Time via spherical trigonometry calculations because the moon's motion provides a clock. Therefore calculating longitude resulted, rather than other navigational tasks which had established solutions using sextants.
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