Question 116Navigation General

70% to pass

You are downbound on the Ohio River locking through Greenup. The chamber has been emptied and the lower gates are open. You hear one short blast of the whistle from the lock. You should _______________.

A hold up until another tow enters the adjacent lock
B hold in the lock chamber due to a malfunction with the gate
C tie off to the guide wall until the river is clear of traffic
D leave the lock
AI Explanation

The correct answer is D) leave the lock. When you hear one short blast of the whistle from the lock, this indicates that the lock is ready for you to depart. With the lower gates open, it is safe for you to exit the lock and continue your downbound transit on the Ohio River. There is no need to hold up, tie off, or wait for any other traffic, as the lock has completed its operation and is signaling for you to proceed. The other answer choices are incorrect because: A) you do not need to wait for another tow to enter the adjacent lock, B) there is no indication of a gate malfunction, and C) you should not need to tie off to the guide wall when the lock is ready for you to depart.

Related Questions
Q@q.QuestionNumber:The difference between the heights of low and high tide is the _______________. Q@q.QuestionNumber:In the North Sea area, you sight a buoy showing a quick white light with 6 flash... Q@q.QuestionNumber:The principal advantage of NAVTEX radio warnings is that _______________. Q@q.QuestionNumber:Under the IALA-B Buoyage System, a conical buoy will be _______________. Q@q.QuestionNumber:By convention, the north seeking ends of a compass' magnets are colored ________...

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