TPC-Tonnage Per Centimeter immersion

                 This is the mass that must be added or removed from a ship in order to change the ship draught by a value of ONE centimeter.

           >TPC varies with the draught and water density.
           >TPC will help us to know the draught at different loads 

            Tonnage Per Centimeter (TPC) = (A) x (d) /100    

                    A = area of water plane at a certain draught
                    d= density of water in which the ship floats.

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