On a wooden-hulled 18th-century ship crossing the Atlantic, which outcome increases risk when differential thermal expansion changes a sextant's calibration?

💡 Explanation

Inaccurate celestial navigation risks occur because thermal expansion causes angular error via optical misalignment, applying small errors to measurements using parallax. Therefore, ships' log becomes inaccurate, rather than structural hull failings/corrosion, affecting navigation accuracy.

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