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Q8. A. Explain the purpose of non-watertight longitudinal subdivision of tanks.

b) A box -barge 30 m long and 9 m beam floats at a draught of 3 m. The centre of gravity lies on the centreline and KG is 3.50 m. A mass of 10 tonne, which is already on board, is now moved 6m across the ship.

i) Estimate the angle to which the vessel will heel, using the formula

ii) Compare the above result with the angle of heel obtained by the metacentric formula. (10)