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.
Squadron Leader George 'Johnny' Johnson, MBE, DFM, served in the Royal Air Force for 22 years. During a distinguished career that took him all over the world, Johnny was selected to be part of the elite 617 Squadron or 'the Dambusters' as they famously became known.
Today marks 75 years since the RAF's now legendary Dambusters set off on their audacious raid to destroy three German dams at the heart of the Nazi war machine.
The 19 Lancasters of 617 Squadron that set off on the night of the Dambusters raid on 16 and 17 May 1943 flew in three waves. What was called the first wave actually took off second, but it comprised the main part of the raid, with nine aircraft, including that of the Commanding Officer, Wing Commander Guy Gibson.
Most of the aircrew from 617 Squadron on the famous Dambusters raid of 16/17 May 1943 did not know the targets they would be heading for until the day of the raid itself.
Most people who know anything about the RAF in the Second World War say that "Roy Chadwick's role is greatly under-rated". He's not the household name that Barnes Wallis or Guy Gibson became, yet his contribution to the war effort in general was immense.
Wing Commander Guy Gibson faced the immense logistical task of forming a new squadron and getting them trained and operational in just a couple of months before the Dambusters raid.
Barnes Wallis came up with the idea for a bouncing bomb that could be used to target strategic dams in 1942. His idea formed the basis of the Dambusters raid that took place in May the following year, causing major damage to two out of the three targets selected.
As the 75th anniversary of the Dambusters raid approaches, we chart the life of Wing Commander Guy Gibson who led 617 Squadron on Operation Chastise.