thinking that a sonic deception is an M1 Abrams platoon, an actual M1 tank must previously be seen driving around the area. It is assumed that the less effective visual observation is on the part of the target, the more effective the projection of the deception is. It is explained that the deception is more effective when employed "to confirm, in the mind of the enemy commander, the information which he already has received as a result of visual deception".

The deception must also be compatible with