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← HistoryWhich positioning error grew unless Harrison's chronometers compensated for drift?
A)Celestial line of position offset✓
B)Dead reckoning cumulative error
C)Sextant measurement parallax distortion
D)Magnetic compass declination variation
💡 Explanation
Celestial navigation relied on accurate time for longitude calculations; without drift compensation, time errors introduced substantial *position line offset*. Because time directly relates to Earth's rotation, a timing error shifts calculated longitude lines, therefore celestial position lines shift in parallel, rather than dead reckoning error diverging.
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