Question 216Navigation General

70% to pass

In illustration D044NG below, what type of buoy is indicated by the letter D?

Diagram for USCG Navigation General: In illustration D044NG below, what type of buoy is indicated by the letter D?
A nun
B pillar
C can
D spar
AI Explanation

The correct answer is A) nun. The letter "D" in illustration D044NG indicates a nun buoy, which is a conical-shaped buoy that marks the port (left) side of a navigable channel when entering from the sea. Nun buoys have an even number and are painted red. The other answer choices are incorrect because: B) pillar buoys are cylindrical in shape, C) can buoys are cylindrical and mark the starboard (right) side of a channel, and D) spar buoys are vertical pole-like buoys used to mark isolated dangers or obstructions.

Related Questions
Q@q.QuestionNumber:In the North Sea area, you sight a buoy showing an uninterrupted quick-flashing ... Q@q.QuestionNumber:The altitude at LAN may be observed by starting several minutes in advance and ... Q@q.QuestionNumber:What information is NOT found in the chart title? Q@q.QuestionNumber:When a buoy is in position only during a certain period of the year, where may t... Q@q.QuestionNumber:As it approaches, a typical warm front will bring _______________.

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.

Get the App