Question 2577Deck Safety70% to pass
You are on a Mariner class cargo vessel. Your drafts are: FWD 21'-04", AFT 23'-04". You wish to increase the calculated GM of 4.8' to 5.8'. What tanks should you ballast? (Use the white pages in the Stability Data Reference Book.)
AI Explanation
The correct answer is D) Tanks: DB4, DB7.
To increase the calculated GM (Metacentric Height) from 4.8' to 5.8', you need to shift the vessel's weight distribution to raise the center of gravity (G). Based on the information provided in the Stability Data Reference Book, ballasting tanks DB4 and DB7 would be the most effective way to achieve this.
The other options are incorrect because they would not provide the desired increase in GM. Ballasting tanks DB6 and DT7 (A), DB2 and DB6 (B), or DB2 and DB5 (C) would not result in the required increase in GM from 4.8' to 5.8'.
Related Questions
#2575 You are on a Mariner class cargo vessel. Your drafts are: FWD 17'-04", AFT 19'-04". You wish to increase the calculated GM of 3.0' to 4.2'. What tanks should you ballast? (Use the white pages in the Stability Data Reference Book.) #2576 You are on a Mariner class cargo vessel. Your drafts are: FWD 26'-06", AFT 28'-02". You wish to increase the calculated GM of 2.7' to 2.9'. What tanks should you ballast? (Use the white pages in the Stability Data Reference Book.) #2578 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.) #2579 You are on a Mariner class cargo vessel. Your drafts are: FWD 24'-00", AFT 25'-08". You wish to increase the calculated GM of 3.0' to 4.1'. What tanks should you ballast? (Use the white pages in the Stability Data Reference Book.) #2580 The SS AMERICAN MARINER is partially loaded with a GM of 2.9 feet and drafts of: FWD 17'-10", AFT 19'-04". Use the white pages of the Stability Data Reference Book to determine what tanks you should ballast to increase the GM to 3.9 feet.