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Which navigational error becomes significant while using chronometers lacking temperature compensation?

A)Inaccurate celestial angle measurements
B)Unreliable prime meridian establishment
C)Underestimated effects of magnetic declination
D)Larger longitudinal position errors develop

💡 Explanation

A chronometer’s oscillation rate changes with temperature due to thermal expansion affecting the balance spring’s isochronism; this is thermoelastic instability. Longer voyages amplify timing errors, therefore longitudinal positions become increasingly wrong, rather than celestial or magnetic errors mattering.

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