"The Submarine Hm Graph, Ex U-boat 570. the German Submarine U 570 Which Was Captured and Renamed HMS Graph. in 1941 a Hudson Aircraft Forced a German U-boat To Surrender on the Surface, Units of the Royal Navy Later Appeared on the Scene and Took Charge of the Surrendered U-boat, Taking the Crew Prisoner. on Arrival in a British Port, the Submarine Was Closely Examined, and Photographs of Its Interior Were Taken." The GRAPH from dead ahead.