Maximum Permissible Deadweight Moment Diagram This is one form of simplified stability data diagram in which a curve of Maximum Permissible Deadweight Moments is plotted against displace ment in tonnes on the vertical axis and Deadweight Moment in tonnes metres on the horizontal axis, the Deadweight Moment being the moment of the Deadweight about the keel The total Deadweight Moment at any displacement must not, under any circumstances, exceed the Maximum Permissible Deadweight Moment at that displacement Figure 47.1 illustrates this type of diagram. The ship's displacement in tonnes is plotted on the vertical axis from 1500 to 4000 tonnes while the Deadweight Moments in tonnes metres are plotted on the horizontal axis From this diagram it can be seen that, for example, the Maximum Deadweight Moment for this ship at a displacement of 3000 tonnes is 10260 tonnes metres(Point 1). If the light displacement for this ship is 1000 tonnes then the Deadweight at this displacement is 2000 tonnes. The maximum kg