A gyrating wave power plant, comprising a body (1) floating on water with a main plane which in calm water is substantially vertical. The body is moored in an orientation with the main plane transverse to the propagation direction of waves. The body has its upper and lower sections provided with arched fins (2, 3). The fins (2) in the body's upper section curve downward when proceeding towards side edges of the body, and the fins (3) in the body's lower section curve upward when proceeding towards side edges of the body. The arched shape of the fins (2, 3) is an oval-shaped spiral with respect to a lateral swaying axis (A) of the body, which is perpendicular to the main plane.

Turbine pumps can include: an inlet port; a first discharge port; a body defining a flow path extending from the inlet port through a raceway to the discharge port; and a turbine impeller disposed in the raceway. In some pumps, the body further defines an channel providing a fluid connection between a raceway outlet and the discharge port. In some pumps, an outlet angle defined by the inlet port, an axis of the turbine, and the discharge port is between 30 and 180 degrees.

Turbine pumps can include: an inlet port; a first discharge port; a body defining a flow path extending from the inlet port through a raceway to the discharge port; and a turbine impeller disposed in the raceway. In some pumps, the body further defines an channel providing a fluid connection between a raceway outlet and the discharge port. In some pumps, an outlet angle defined by the inlet port, an axis of the turbine, and the discharge port is between 30 and 180 degrees.