Abstract: A retractable shade structure is positionable and usable in covering relation to a boat. The shade structure includes a pair of generally parallel, substantially horizontal rails supportable above a surface of a body of water. A collapsible shade is suspended between the rails and is movable between an extended position wherein the shade covers at least a portion of the water body surface defined by the rails and a retracted position wherein the shade is folded upon itself to expose at least some of the water body surface portion. The movement of the shade is remotely controllable.