During the Second World War Barnes Wallis devised a surface torpedo that was able to avoid underwater defenses by bouncing across water. This eventually resulted in a highly successful bombing raid using Lancaster bombers and lead by the pilot Guy Gibson against Germany’s industrial areas where dams were targeted and destroyed. One of the reasons the bouncing bomb was so successful is it would rest right up against the wall of the dam and then explode at the desired depth. A traditional bomb would never be able to have that sort of accuracy.
Find out more about the bouncing bomb over at LinkedIn here.