Surveillance Detection and Counter-Surveillance
Detecting and defeating surveillance
Surveillance detection (SD) is the disciplined process of identifying whether the team or principal is being watched. Candidates must understand the surveillance detection route (SDR) - a planned route that creates opportunities to confirm or deny surveillance without alerting the watcher. SDRs use stops, turns, and natural pauses; they must look natural and fit the environment.
Key concepts include hostile surveillance (adversary collection), surveillance detection run versus anti-surveillance (active measures to evade), and the three-times rule - a possible watcher seen across three separate opportunities is likely confirmed. Officers should record time, location, description, and behaviour. Counter-surveillance also covers technical measures: sweeping for devices, checking vehicles, and controlling information about the principal's movements.
Traps and rule of thumb
A frequent trap is treating a single sighting as confirmed surveillance; one repeat may be coincidence. Another is conducting an SDR that is obviously unnatural - repeated U-turns and dead-end entries signal that the team is aware, prompting the adversary to change tactics. Also beware of confusing SD (detect) with anti-surveillance (evade); they are different activities with different triggers.
Worked rule of thumb: apply the three-times rule - log each opportunity, and only escalate to confirmed surveillance after three consistent sightings across separate locations and times.