Question 2578 Deck Safety

70% to pass

You are on a Mariner class cargo vessel. Your drafts are: FWD 22'-06", AFT 25'-06". You wish to increase the calculated GM of 4.8' to 5.9'. What tanks should you ballast? (Use the white pages in the Stability Data Reference Book.)

A Tanks: DB2, DB5
B Tanks: DB5, DT6
C Tanks: DB3, DB4
D Tanks: DB2, DB6, DB7
AI Explanation

The correct answer is A) Tanks: DB2, DB5. To increase the calculated GM (Metacentric Height) from 4.8' to 5.9', you need to adjust the vessel's weight distribution. The Stability Data Reference Book's white pages provide guidance on how to manipulate the GM by ballasting specific tanks. In this case, ballasting tanks DB2 and DB5 will increase the GM to the desired 5.9'. The other answer options do not provide the right combination of tanks to achieve the target GM increase.

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Official Resources
46 CFR Lifesaving Equipment USCG Marine Safety Center USCG National Maritime Center
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