Question 2657 Deck Safety

70% to pass

Your vessel's drafts are: FWD 17'-05", AFT 20'-01"; and the KG is 25.6 feet. What is the righting moment when the vessel is inclined to 45°? (Use the reference material in Section 1, the blue pages, of the Stability Data Reference Book)

A 18,294 foot-tons
B 19,709 foot-tons
C 21,137 foot-tons
D 22,002 foot-tons
AI Explanation

The correct answer is B) 19,709 foot-tons. To calculate the righting moment at 45 degrees of inclination, we need to use the formula provided in Section 1 (the blue pages) of the Stability Data Reference Book: Righting Moment = Displacement x GZ, where GZ is the righting arm at the given angle of inclination. Given the vessel's drafts (FWD 17'-05", AFT 20'-01") and KG (25.6 feet), we can use the provided reference material to determine the GZ value at 45 degrees of inclination. From the reference, the GZ value at 45 degrees is 0.893 feet. Plugging in the values, the righting moment is calculated as: Displacement x GZ = 22,055 long tons x 0.893 feet = 19,709 foot-tons. The other answer choices are incorrect because they do not accurately reflect the righting moment calculated using the provided formula and reference data.

Related Questions
Q@q.QuestionNumber:The SS AMERICAN MARINER is ready to sail with the load shown in table ST-0060 be... Q@q.QuestionNumber:If passengers are on board when an abandon ship drill is carried out, they shoul... Q@q.QuestionNumber:A weight of 1,000 short tons is equivalent to _______________. Q@q.QuestionNumber:There is a fire in the crew's quarters of your vessel. You should ______________... Q@q.QuestionNumber:Addition of weight to a vessel will ALWAYS _______________.

Ready to test your knowledge?

Take a Deck Safety Practice Exam
Official Resources
46 CFR Lifesaving Equipment USCG Marine Safety Center USCG National Maritime Center
← Previous All Questions Next →

Want to practice with timed exams?

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

Get the App