A pontoon is allowed to float in a small tank having a transparent side. Removable steel
strips placed in the model for the purpose of changing the weight of the model.
Displacement of weight is measured with the help of a scale. By means of a pendulum
(consisting of a weight suspended to a long pointer) the angle of tilt can be measured on a
graduated arc. For tilting the ship model, a cross bar with movable hanger is fixed on the
model. A set of weights is supplied with the apparatus.