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Second moments of areas 265
of that between the other half-ordinates. Calculate the second moment of the waterplane area about the centre line and about a transverse axis through the centre of ¯otation.
10 A ship's waterplane is 90 metres long between perpendiculars. The half- ordinates at this waterplane are as follows:
Station AP 12 1 2 3 4 5 512 FP 12 Ords. (m) 0 2 4.88 6.71 7.31 7.01 6.40 2 0.9
Calculate the second moment of the waterplane area about the centre line and also about a transverse axis through the centre of ¯otation.
