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Q6. A. With reference to dynamical stability, describe the effect of an increase in wind pressure when a vessel is at its maximum angle of roll to windward.

B. A ship of 15000 tonne displacement has righting levers of 0, 0.38, 1.0, 1.41 and 1.2 m at angles of hell of 0 , 15 , 30 , 45  and 60  respectively and an assumed KG of 7.0 m.  The vessel is loaded to this displacement but the KG is found to be 6.80m and GM 1.5m –

(i) Draw the amended stability curve; (ii) Estimate the dynamic stability at 60