Question 928 Rules of the Road

90% to pass

BOTH INTERNATIONAL & INLAND In a dense fog, you hear a whistle signal of one prolonged blast followed by three short blasts. Which vessel is required to sound this signal?

A Manned vessel being towed
B Vessel not under command
C Fishing vessel underway trawling
D Pilot vessel underway making a special signal
AI Explanation

The correct answer is A) Manned vessel being towed. According to the International Regulations for Preventing Collisions at Sea (COLREGS) and the Inland Navigation Rules, the signal of one prolonged blast followed by three short blasts is the proper whistle signal for a manned vessel that is being towed. This signal indicates that the towed vessel is not under command and has limited maneuverability. The other options are incorrect because: B) A vessel not under command would sound a different signal (two prolonged blasts), C) A fishing vessel underway trawling would not use this signal, and D) A pilot vessel underway making a special signal would use a different whistle sequence.

Related Questions
Q@q.QuestionNumber:BOTH INTERNATIONAL & INLAND What is the optional whistle signal which may be sou... Q@q.QuestionNumber:INLAND ONLY What must a partially submerged object towed by a vessel show during... Q@q.QuestionNumber:BOTH INTERNATIONAL & INLAND A 200-meter vessel is aground in restricted visibili... Q@q.QuestionNumber:BOTH INTERNATIONAL & INLAND In illustration D023RR below "B" represents the arc ... Q@q.QuestionNumber:BOTH INTERNATIONAL & INLAND In a crossing situation, a vessel fishing must keep ...

Ready to test your knowledge?

Take a Rules of the Road Practice Exam
Official Resources
USCG Navigation Rules (COLREGS) 33 CFR Navigation Rules USCG Navigation Center
← Previous Question All Questions Next Question →

Want to practice with timed exams?

Download Coast Guard Exams for the full exam experience with progress tracking.

Get the App