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Q9. A. Describe how water tightness is maintained where bulkheads are pierced by longitudinal beams or pipes.

b) The length of a ship is 7.6 times the breadth, while the breadth is 2.85 times the draught. The block coefficient is 0.69, prismatic coefficient 0.735, waterplane area coefficient 0.81 and the wetted surface area 7000 m2. The wetted surface area S is given by Denny's formula.

Calculate: (a) displacement in tonne (b) area of immersed midship section (c) waterplane area.