The angle of tilt is measured by displacement of pointer & from then the metacentric height of ship can be studied. Displacement of weight is measured with a scale. A pointer is attached at the centre of ship. When the weight is slide the ship tilts. 

The ship model is provided with a horizontal guide bar over which a small weight can be slided. The unit consists of a small tank. Water is poured in it; so that a small ship model can float over it.