Question 2580Deck Safety70% to pass
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.
AI Explanation
The correct answer is B) Tanks: DB4, DT6.
To increase the GM (Metacentric Height) from 2.9 feet to 3.9 feet, you need to shift weight from the higher positions to the lower positions. By ballasting tanks DB4 and DT6, you can effectively lower the center of gravity and increase the GM as required.
The other options are incorrect because:
A) Tanks DB2, DT1, and DT6 may not provide the necessary change in weight distribution to achieve the desired GM increase.
C) Tanks DB6 and DT7 are not the optimal choices to increase the GM from the given conditions.
D) Tanks DB3, DB5, and DT8 are not the most effective combination to achieve the desired GM increase.
Related Questions
#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.) #2581 The SS AMERICAN MARINER is partially loaded with a GM of 3.1 feet and drafts of: FWD 19'-06", AFT 21'-04". Use the white pages of the Stability Data Reference Book to determine what tank(s) you should ballast to increase the GM to 3.7 feet. #2582 The SS AMERICAN MARINER is partially loaded with a GM of 3.1 feet and drafts of: FWD 16'-00", AFT 18'-04". Use the white pages of the Stability Data Reference Book to determine what tank(s) you should ballast to increase the GM to 3.6 feet. #2583 The SS AMERICAN MARINER is partially loaded with a GM of 2.6 feet and drafts of: FWD 13'-07", AFT 15'-01". Use the white pages of the Stability Data Reference Book to determine what tanks you should ballast to increase the GM to 3.4 feet.