On the night of 16-17 May 1943, the RAF's 617 Squadron carried out an audacious bombing raid attacking dams serving the Ruhr valley, leaving German factories and mines badly damaged. Learn more about the Dambusters and read our series of specially commissioned blogs featuring interviews with Dambusters bomb-aimer, Johnny Johnson and the late Dambusters hero Les Munro.
Canadian Flying Officer Robert Urqhuart was the navigator for Squadron Leader Henry Maudslay's Lancaster on the night of Operation Chastise, the Dambusters raid of May 16/17, 1943.
The third and final wave of the five aircraft attack as part of the Dambusters raid set off after midnight. They were used as a reserve force that would be directed to targets where the earlier waves had failed to achieve their objective.
Of the five aircraft sent to breach the Sorpe dam on 17 May 1943 during the Dambusters raid, only two reached their target. Despite bomb aimer Johnny Johnson's deadly accuracy, the bomb failed to breach the dam.