Which error increases when an 18th-century navigator fails to account for dip when using a sextant?

💡 Explanation

When a navigator neglects dip, also known as the height of eye, parallax error causes an overestimation of celestial altitude because the horizon appears higher than true, relative to sea level. Therefore celestial altitude is over-reported, rather than lunar distance, longitude, or local time, which depend on other calculations and timing factors.

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