┌───────────────────────────────────────────────┬──────────┬──────────┐ │ │_Monarch._│_Captain._│ ├───────────────────────────────────────────────┼──────────┼──────────┤ │ I. Angle at which the edge of the deck is │ 28° │ 14° │ │ immersed │ │ │ │ II. Statical righting force in foot-tons at │ 12,542 │ 5,700 │ │ the angle at which the deck is immersed │ │ │ │III. Angle of greatest stability │ 40° │ 21° │ │ IV. Greatest righting force in foot-tons │ 15,615 │ 7,100 │ │ V. Angle at which the righting force ceases │ 59° │ 54° │ │ VI. Reserve of dynamical stability at an angle│ 6,500 │ 410 │ │ of 14° in _dynamical_ foot-tons │ │ │ └───────────────────────────────────────────────┴──────────┴──────────┘ From No. V. in the above table we learn that if the _Captain_ had been heeled to 54°, the centre of gravity would have overtaken the centre of buoyancy—that is, the two would have been in one vertical line. Any further heeling would have brought the points into the position shown in Fig. 75, where it is obvious that the action of the forces is now to turn the vessel still more on its side, and the result is an upsetting couple instead of a righting couple. These figures and considerations refer to the case of the vessel floating in smooth water, but the case of a vessel floating on a wave is not different in principle. The reader may picture to himself the diagrams inclined so that the water-line may represent a portion of the wave’s surface; then he must remember that the very action which heaves up the water in a sloping surface is so compounded with gravity, that the forces acting through G and B retain nearly the same position relatively to the surface as before.