Q1. A ship of length 160 m displaces 22862 tonnes when floating at a draught of 8.526 m in sea water density 1025 kg/m3.
The waterplane area is defined by half breadths as given in Table Q1.
The following tanks are partially full of liquid as indicated:
ONE rectangular tank 10.2 m long and 6 m wide, containing fresh water of density 1000 kg/m3.
ONE rectangular tank 7.4 m long and 5 m wide containing oil fuel of density 890 kg/m3.
When a mass of 20 tonne is moved a distance of 22 m across the deck, a deflection of 71 mm is recorded on a pendulum of 9.2 m length.
The height of the centre of buoyancy above the keel (KB) may be determined using Morrish’s formula as given below:
KB =[5/6×d]-[∇/3×Aw ]
Calculate the KG of the ship in the above condition. (16)
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