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← HistoryWhich accuracy risk increased when using chronometers for longitude determination in 18th-century sailing despite use of sextants?
A)Clock drift causing position error✓
B)Magnetic compass variation inaccuracies
C)Atmospheric refraction impacting celestial sights
D)Ship's speed through water miscalculation
💡 Explanation
When using chronometers for navigation, accumulated clock drift degrades accuracy of longitude determination because time difference between departure port and current location becomes inaccurate, causing positional errors. Therefore clock drift induced position error results because sextant only measures latitude and alternative errors are less dependent on chronometer accuracy.
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