A PATROL LOGGING SYSTEM

A system comprises a plurality of patrol logging units 103, wherein each patrol logging unit is assigned a unique identification and comprises an output, such as a display, 202 and processing circuitry 201 including a controller 203, an internal local clock 204 and a code generator 205. The controller is operable to generate a code to be output in response to being activated; the code being based on time information provided by the clock and the unique identification of each patrol logging unit. The internal local clock of each patrol logging unit is autonomously independent and so is unpredictable from the time information of other internal local clocks of other patrol logging units. The code given by the logging unit can be transmitted to a central station 101 via a mobile telephone 102 of a security guard patrolling the site. The central station can obtain the unique identifier and the time from the code, as well as identification of the user from a mobile telephone number, and so record that a certain guard was at a certain location at a certain time. The invention provides a system and method for checking the patrol of a guard.