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← HistoryWhich navigational error increases when a sextant mirror distorts the horizon line during twilight observations?
A)Increased error in chronometer synchronization
B)Reduced accuracy in celestial body altitude✓
C)Overestimation of ship's leeway angle
D)Underestimation of magnetic variation
💡 Explanation
When the horizon line is distorted, parallax error increases, impacting a user’s ability to accurately measure a celestial body's height with the sextant. Therefore accuracy decreases, rather than increased sway, underestimating magnetic variation, or needing synchronization, which relate to other independent systems.
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