Foam monitors are designed to control the horizontal and vertical directions of large capacity discharge streams. Water-oscillating monitors will automatically move side-to-side using water pressure as the energy source. Remote controlled monitors use an electric joystick tied into a hydraulic system. Other monitors are operated manually using a tiller bar to control direction and elevation. Various aspirating and non-aspirating nozzles are also available for use with monitors and/or handlines. All foam monitors are self-inducing and all that is required to operate is a high-pressure water supply.