A ship of FWA 175mm goes from water of RD 1.006 to water 0f RD 1.018 . Find the amount of sinkage or rise.

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Solution:

FWA = 175mm = 17.5cm

We can calculate:

Change in draft = 

(Change in RD )x(FWA)
             0.025

= (1.018 – 1.006) x 17.5 /(0 .025)
= (0.012 x 17.5) /(0 .025)
= 8.4cm

Here change in draft would cause rise of vessel.

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