Which risk increased for ships using early sextants for celestial navigation in high latitudes near sunset?

💡 Explanation

When navigating in high latitudes near sunset, light from celestial bodies passes through a greater amount of atmosphere at a shallow angle, causing increased refraction because density gradients become highly pronounced and more variable near the horizon. Therefore increased refraction error results, rather than parallax, drift, or fogging which depend on different instrument limitations and environmental factors.

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