Which consequence results if a period 1750-1820 ship's chronometer experiences sustained pendulum-effect motions?

💡 Explanation

When a ship's chronometer suffers sustained pendulum motions, isochronism suffers because balance wheel swing period varies due to altered gravitational influence, leading progressive time drift. Therefore longitude is affected given its time-based determination, rather than orbit calculations, parallax or star declinations, which relate to other navigational factors.

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