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Final KG 95
w2 Kg2 in directions indicated in the ®gure. The ®nal moment about the keel will be equal to the original moment plus the moment of the weight added minus the moment of the weight discharged. But the ®nal moment must also be equal to the ®nal displacement multiplied by the ®nal KG as shown in Figure 11.1(b). i.e.
or
Final moment Final KG Final displacement Final KG Final moment
Final displacement
Example 1
A ship of 6000 tonnes displacement has KG 6m and KM 7.33m. The following cargo is loaded:
1000 tonnes; 500 tonnes; 750 tonnes;
The following is then discharged:
450 tonnes of
KG2:5m KG3:5m KG9:0m
cargo KG 0:6 m cargo KG 3:0 m
Moment about the keel
36 000 2500 1750 6750
47 000 270 2400
44 330
Find the ®nal GM.
Weight
6000 1000 500 750
8250 450 800
7000
and 800 tonnes of
KG
6.0 2.5 3.5 9.0
0.6 3.0
