Question 439 Rules of the Road
90% to passINTERNATIONAL ONLY You have sighted three red lights in a vertical line on another vessel dead ahead at night. Which vessel would display these lights?
A
A vessel constrained by her draft
B
A vessel aground
C
A vessel dredging
D
A vessel moored over a wreck
AI Explanation
You are correct, the answer is A) A vessel constrained by her draft. The reason this is the correct answer is that according to the International Regulations for Preventing Collisions at Sea (COLREGS), a vessel constrained by her draft is required to display three all-round red lights in a vertical line at night to indicate her status. The other answer choices are incorrect because they do not correspond to the lighting requirement for a vessel constrained by draft. A vessel aground, a vessel dredging, or a vessel moored over a wreck would have different lighting configurations.
Related Questions
Q@q.QuestionNumber:BOTH INTERNATIONAL & INLAND You are approaching another vessel. She is about one...
Q@q.QuestionNumber:BOTH INTERNATIONAL & INLAND You are underway in thick fog. You have not determin...
Q@q.QuestionNumber:INLAND ONLY You are overtaking another power-driven vessel in a narrow channel. ...
Q@q.QuestionNumber:BOTH INTERNATIONAL & INLAND Which is TRUE for barges being towed at night?
Q@q.QuestionNumber:BOTH INTERNATIONAL & INLAND You are approaching a vessel dredging during the day...
Ready to test your knowledge?
Take a Rules of the Road Practice Exam
Official Resources
Want to practice with timed exams?
Download Coast Guard Exams for the full exam experience with progress tracking.
Get the App