A ship goes from the water of RD 1.008 to SW. Find the change in draft, if her FWA is 180mm, and state whether it would be sinkage or rise.

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Solution :

FWA = 180mm = 18cm

We can calculate :

Change in draft = 

(Change in RD )x(FWA)
             0.025

= (1.008 – 1.025 ) x 18 / 0.025
=(0.017 x 18)/0.025
= 12.24c
= 0.12m

Here , Change in draft is  0.122m and it will be rise.

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