Question 2308 Deck Safety

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.