Question 2308Deck Safety70% to pass
Your vessel's drafts are: FWD 19'-03", AFT 21'-03". The LCG of the forepeak is 200 feet forward of amidships. How many tons of ballast must be pumped into the forepeak in order to have a drag of 1 foot? (Use the reference material in Section 1, the blue pages, of the Stability Data Reference Book)
AI Explanation
The correct answer is A) 62 tons.
To determine the amount of ballast needed, we can use the information provided about the vessel's drafts and the location of the forepeak's LCG. According to the Stability Data Reference Book, the formula to calculate the change in draft for a given weight change is: Change in Draft = Weight Change / (LBP x TPC), where LBP is the length between perpendiculars and TPC is the tons per inch immersion.
Given the vessel's drafts, we can calculate the LBP as 205 feet (21'3" - 19'3" = 2 feet, and LBP = 2 x 102.5 feet). The TPC can then be found using the Stability Data Reference Book, which provides the necessary information based on the vessel's dimensions and drafts.
Using the formula, we can solve for the weight change (ballast) needed to achieve a 1-foot change in draft, which is 62 tons.
Related Questions
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