Maskalyne was responsible for building a Q site for Alexandria harbour. The Suez canal defence consisted of twenty one searchlights fitted with rotating reflectors creating a flickering, same principal as the CDL. Although Maskalyne and his team oversaw a large manufacturing area for dummies and deception products, its questionable how many of the products were original ideas or adaptions of other peoples work. What Maskalyne did do was bring a further twist into deception, employing stage magician techniques. Deception Distraction and Misdirection. Some techniques involved placing an obvious dummy in position then later when the opposition had lost intrest then replacing it with real kit, dropping large hints, to concentrate the opposition again, whilst things happened elsewhere. Unfortunatley most information seems to be from Masklyne himself, and bear in mind he was a proffesional showman, with an eye to profit.