This fifth itinerary, currently under development, is intended to host examples of water figures and density waves.

Few molecules per single event.

In liquid water, the "force d" acts frequently, but only on a few molecules per single event. It only affects those moving at one of the critical angular velocities, relative to the Moon, for example.

Consequently, the processes that generate the tidal phenomenon—that is, the increase and decrease in the volume of water—are usually continuous but hidden from the naked eye because they are diffuse. Whether the tide is rising or falling is always just a moving result.

When the water is completely still.

When the water is completely still, and all the molecules move in unison—relative to the Moon, for example—at one of the critical angular velocities, the phenomenon of water figures and density waves occurs.

This is when the cumulative and dissipative phases alternate every two or three seconds for all the water molecules. This is when the large difference in volume between the two phases becomes apparent.

The phenomenon is evident in specific places and at specific times. Often, the phenomenon is only partial, and the figures are not clear.