What is a "patrol log"?

A patrol log serves as an essential documentation tool for security personnel, providing a detailed record of the patrol activities they undertake during their shifts. This log typically includes information such as the times and locations of patrols, observations made, and any incidents or anomalies encountered. By maintaining an accurate patrol log, security guards can ensure accountability and provide a comprehensive overview of their presence and actions, which may be vital for investigations or management reviews later.

The other choices represent different types of documentation that may be relevant in a security context but do not specifically align with the purpose of a patrol log. For example, a list of personnel on duty is more related to staffing and communication, while incident reports are focused solely on specific events that necessitate further attention. Similarly, a record of customer complaints is distinct from patrol activities, as it deals more with service quality than security procedures. Hence, the portrayal of the patrol log as a record of patrol activities is what makes it the correct answer.