Question 811Navigation General

70% to pass

The horizon glass of a sextant is _______________.

A mounted on the index arm
B between the horizon and the shade glasses
C silvered on its half nearer the frame
D All of the above
AI Explanation

The correct answer is C) silvered on its half nearer the frame. The horizon glass of a sextant is silvered on its half nearer the frame to create a clear reflection of the horizon. This allows the user to align the reflected image of a celestial body with the actual horizon, enabling the measurement of the altitude of the body above the horizon. The other answer choices do not accurately describe the function and construction of the horizon glass.

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Official Resources
USCG Navigation Rules (COLREGS) 33 CFR Navigation Rules USCG National Maritime Center
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