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Q4. ship of 7200 tonne displacement floats at a draught of 5.2 m in sea water of density 1025 kg/m³. Area of waterplane is 1600 m², centre of buoyancy above the keel (KB) is 2.7 m and metacentric radius (BM) is 4.4 m.
A centrally located rectangular midship compartment 25 m long and 10 m wide is now bilged, causing bodily sinkage to a new draught of 5.8 m.
Calculate EACH of the following using the lost buoyancy method:
(a) the permeability of the compartment; (4)
(b) the change in transverse metacentric height due to bilging the compartment.  (12)