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.

Related Questions
Q587:What is the compass course of a vessel heading NNE? Q1634:The point on the celestial sphere that is directly below an observer is the ____... Q296:When entering from seaward, a buoy displaying a single-flashing red light indic... Q1738:The standard time meridian for description +12 is _______________. Q1443:You are on course 209°T. In order to check the longitude of your vessel, you sho...

Ready to test your knowledge?

Take a Navigation General Practice Exam
Official Resources
USCG Navigation Rules (COLREGS) 33 CFR Navigation Rules USCG National Maritime Center
← Previous All Questions Next →

Want to practice with timed exams?

Download Coast Guard Exams for the full exam experience.

App Store