A fully developed sea is when the maximum fetch and duration are attained for a given wind speed. Eventually much of this energy is released along the ocean margins when swells hit the shore, causing erosion. They are followed by slower wave-trains . This sorting by wavelength is called wave dispersion . They produce the algebraic sum of their individual disturbances.
Rogue waves are very rare large waves, probably due to unusual constructive wave interference.
They are most frequent downwind from islands or shoals or where storm waves move against strong ocean currents, such as the Agulhas current off the southeastern coast of Africa. Rogue waves may sink or damage ships and often wash fishermen off rocks. The energy of swells is released in the surf zone, where breakers form. There is a significant transport of water towards the shore under these conditions. The curling particles outrun the wave.