Which tool is commonly used for surveillance in security operations?

Closed-circuit television (CCTV) is a widely recognized tool utilized for surveillance in security operations. This system involves strategically positioned cameras that continuously capture video feed within a designated area. The footage is transmitted to a limited set of monitors, allowing security personnel to observe real-time activities, deter criminal behavior, and maintain overall safety.

CCTV is favored for its capability to cover large areas, provide continuous monitoring, and capture evidence for investigations. Its effectiveness is enhanced by functionality such as night vision, digital recording, and remote viewing, which is beneficial in various settings like commercial establishments, public spaces, and critical infrastructure.

Other options, while relevant to security and surveillance, serve different specific functions. Hand-held cameras may be used for documentation or specific incidents rather than continuous monitoring. Infrared sensors and motion detectors are essential components of security systems, primarily for detecting movement or changes in heat but do not provide live video surveillance like CCTV does. Thus, the choice of CCTV aligns neatly with the core need for a reliable, comprehensive surveillance tool in security operations.