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Q7. A box shaped barge of length 70 m has a full mass of 420 tonne which is evenly distributed throughout its length. Bulkheads are located 5 m from the barge ends to form peak tanks which are empty.

The remainder of the barge is divided by two transverse bulkheads to form three holds of equal lengths. These holds are loaded with a total of 1680 tonne of level stowed bulk cargo, 480 tonne of which is loaded in the centre hold and the remainder is equally distributed in the other two holds.

Using graph paper, draw EACH of the following curves on a base of ship length:

(a) Weight and buoyancy curves;    (5)

(b) Load curve;(3)

(c) Shear force curve;(4)

(d) Bending moment curve. (4)