The Rolling Period Test is a stability test used to assess the transverse stability of vessels, particularly smaller ships and boats. This test helps determine the natural rolling period of a vessel, which is the time it takes for the vessel to complete one full oscillation (roll to one side, then to the other, and back to the original position). It is an imprecise method for determining the initial metacentric height of a ship. However, it can be used for an approximate determination of the initial stability."