Point absorbers, often simply called a buoy, are relatively
small devices in comparison to other WEC types (Fig. 4b).
They are typically cylindrical in shape and constrained to one
major motion degree, usually up-and-down. They are
generally significantly smaller in diameter than a wavelength.
A point absorber harvests energy in all directions through its
movements at/near the water surface. The PTO system may
take a number of forms as the following main projects.