SAS Anti-Surveillance and Counter-Surveillance Techniques

Counter-surveillance and anti-surveillance, particularly with respect to operators, must be considered from two aspects: -As conducted by a subject of surveillance -As practiced by a Surveillance Operator The object of this document is to make the operator aware of some counter- surveillance techniques. These can and have been employed by foreign sources and hostile intelligence officers during the course of their activities, or by a surveillance operator to protect their own operational and personal security.