Abstract: A method and a device for performing the methods, for response to a spill on water whereby one end of an oil boom is towed from the shore of a watercourse with flowing water, at an angle to the water current, to a suitable position in the watercourse, using a waterborne current rudder. The current rudder is secured to one end of a line, the other end of the line is secured to an upstream point ashore, allowing the current rudder to move out into the stream and to maintain one end of the oil boom in a suitable position in the watercourse, while the other end of the oil boom is secured to a downstream point ashore, where an oil recovery device is positioned. The current rudder is fitted with a balance rudder operated by a line or a remote control from shore, allowing the current rudder and the oil boom end attached thereto, to be recovered to shore when so required.