The NA8 Ships Stability System is designed for the study of ship hydrostatics and stability. A comprehensive manual provides hydrostatic stability and other data for ship models and includes a number of experiments which are useful to students. Exercises are conducted on a 1/70 scale model of a general cargo vessel of 28,000-tonne ship mass. Rolling, righting and the effects of flooding various compartments may be studied. Optional alternative ships models are also available for study.