Of the four light characteristics shown in... - USCG Navigation General

Of the four light characteristics shown in illustration D019NG below which one does NOT represent a safe water mark of the IALA Buoyage System?

Diagram for USCG Navigation General: Of the four light characteristics shown in illustration D019NG below which one...

A A

B B

C C

D D

AI Explanation

The correct answer is A. The IALA Buoyage System defines four primary light characteristics: fixed, flashing, occulting, and isophase. Option A, which depicts a fixed light, does not represent a safe water mark in the IALA Buoyage System. Safe water marks are typically indicated by a white light with a red sector or a white light with a green and red sector. The other options, B (flashing), C (occulting), and D (isophase), can represent safe water marks in the IALA Buoyage System.

Related Questions

Q@q.QuestionNumber:During daylight hours black double-cone topmarks are the most important feature ... Q@q.QuestionNumber:The upper vertex of a great circle track is in LONG 156°00'E. Sailing eastward, ... Q@q.QuestionNumber:Some locations maintain a zone time of -13. What are the Greenwich time and date... Q@q.QuestionNumber:The class of tide that prevails in the greatest number of important harbors on t... Q@q.QuestionNumber:The first point of Aries is the point where the Sun is at _______________.

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

Want to practice with timed exams?

Download Coast Guard Exams for the full exam experience.

Get the App

Question 311Navigation General

Of the four light characteristics shown in illustration D019NG below which one does NOT represent a safe water mark of the IALA Buoyage System?

Want to practice with timed exams?