The vessel Waibel 11 went aground on the Rhine River near Plittersdorf, Germany.   The Waibel’s rudder had failed and the vessel drifted onto a gravel bank.   The Waibel 11 was unable to free itself and a dredger has been requested to lighter the Waibel of 600 tons of its 2100 tons of gravel on board.   No reports of injuries, damage or pollution being released.