A ship’s stability data book gives her load displacement to be 18000 t and TPC to be 25. If she is now loading in DW of RD 1.018, by how much may her be loadline be immerse so that she would not be overloaded.

Solution :

Load displacement = 18000t,
TPC =25.

We know that:
FWA = W/(40 TPC)
= 18000/( 40 x 25 )

We can calculate:

Change in draft = 

(Change in RD )x(FWA)

=(1.025 – 1.018 ) x 18 /0.025
= .05m

Since, Her load line should immersed to 0.05 m so that she will not be loaded.

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