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← HistoryWhich inaccuracy increased for ships using early chronometers if improperly shielded from temperature fluctuations?
A)Declination angle calculations drifted
B)Longitude estimates showed increased error✓
C)Observed tidal patterns became skewed
D)Compass headings changed unpredictably
💡 Explanation
Improper shielding caused a temperature-dependent frequency shift in the balance spring, because thermal expansion altered its period through thermoelastic damping rather than isochronism. Therefore, longitude (dependent on accurate timekeeping) progressively worsened, despite accurately calibrated declination measurement.
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