The visual element required the physical transportation of hundreds of inflatable vehicles to the deception site. The dummies were deflated and stored in vehicles, and then inflated and positioned in ways that created a convincing assembly area. This work had to happen at night, to avoid German observers seeing the actual inflation process — which would have immediately revealed what the vehicles were. By dawn, the assembly area had to look like it had been there for some time, with the environmental signs of a large force’s presence: tracks, disturbed vegetation, staged supply positions.
The sonic element required careful timing. The recordings were played when conditions — wind, temperature, atmospheric humidity — favored propagation of the sound toward German positions. The halftrack-mounted speakers projected the sounds of a force that wasn’t there: tanks moving, boats launching, engineers working in the darkness. German soldiers in forward positions could hear what sounded like an entire army preparing to attack.
The radio element was continuous. The Signal Company Special operators ran their fake traffic networks throughout the operation, maintaining the communication patterns that the real units they were impersonating would have been generating. This required discipline and consistency: a gap in the traffic, or a pattern that deviated from the established style of the unit being impersonated, could alert German signals intelligence that something was wrong.
The human element — the soldiers sent to bars and cafes with their fake division patches — added the specific kind of intelligence that the German system was likely to receive from human sources. If German intelligence was gathering reports from agents in the area, those agents would report encountering troops from the 30th or 79th Division, confirming the other indicators.