Abstract: A multi-sectioned, multi-purpose, illuminated marking device especially suitable as a water buoy in which the components can be readily assembled in end-to-end relationship to provide a buoyant device which can be readily seen for a considerable distance when located in the water or elsewhere. The assembled sections serve to house a lightbulb, batteries, switch system, and a reflector which, when the switch is turned on, causes the light to be magnified and transmitted through the translucent walls of the housing. The device also includes an anchor attached to a line and reel to permit raising and lowering of the anchor, the line being multicolored to enable it to be used as a depth indicator. The exterior of the assembled sections are provided with reflective means such as tape or paint to reflect light and permit location of the device when the electric light system, is inoperative or malfunctioning.