The safety device and a method for locating a security device

The first aspect of the invention is a floating safety device, which is arranged to be anchored in a water system such that, when anchored, a part of the safety device is below the surface of the water and a part of the safety device is above the surface of the water. The safety device is characterized in that the part above the surface of the water comprises a reflector for reflecting radio waves sent by a remote-sensing radar. The second aspect of the invention is a method for defining the location of a floating safety device.