The crews consisted of 7 members on the night of the raid as did all other 18 aircraft.
They were made up thus as in the case of it's leader Guy Gibson.
W.Cdr G Gibson Captain
Sgt. J Pulford F/Engineer
F/O H T Taerum Navigator
F/Lt R E G Hutchinson Wireless Operator
P/O F M Spafford A/Bomb Aimer
F/Sgt G Deering Front Gunner
F/Lt R Trevor-Roper Rear Gunner
Curiously, the official records of the raid give the word 'Dinghy' as being the signal sent when a dam had been breached. The world knows it as 'Nigger' - just as was in the film shown on TV this week.
Strange that.