A maritime vessel dynamic positioning control system, the system comprising: at least one dynamic positioning processor arranged to receive dynamic positioning data of the maritime vessel from a plurality of sensors, and to receive data representative of the activity of an operator when controlling the dynamic positioning of the maritime vessel; an activity monitoring and recording system configured to monitor and record data relating to the dynamic positioning of the maritime vessel and data representative of the activity of an operator, the activity monitoring and recording system comprising: a monitoring arrangement configured to monitor the dynamic positioning data and the data representative of the activity of the operator when controlling the dynamic positioning of the maritime vessel, the dynamic positioning data and data representative of the activity of the operator being communicated to the monitoring arrangement from the at least one dynamic positioning processor; an activity monitoring and recording system processor, communicatively coupled with the monitoring arrangement, which is configured to process the monitored data; at least one tag comprising operator identification; and, a tag interrogating device configured to interrogate the tag to determine the identity of the operator of the dynamic positioning system, and which is configured to record the processed data to the tag; an operator interface comprising: a display screen configured to display the monitored data; and an input device (12b, 12c, 12d) configured to enter control signals by the operator to operate the thrusters of the maritime vessel to counter deviations from a desired position of the maritime vessel over the seabed based on the monitored data; an interface processor which is arranged to receive data from the at least one dynamic positioning processor and display the data on the display screen. at least one dynamic positioning processor arranged to receive dynamic positioning data of the maritime vessel from a plurality of sensors, and to receive data representative of the activity of an operator when controlling the dynamic positioning of the maritime vessel; an activity monitoring and recording system configured to monitor and record data relating to the dynamic positioning of the maritime vessel and data representative of the activity of an operator, the activity monitoring and recording system comprising: a monitoring arrangement configured to monitor the dynamic positioning data and the data representative of the activity of the operator when controlling the dynamic positioning of the maritime vessel, the dynamic positioning data and data representative of the activity of the operator being communicated to the monitoring arrangement from the at least one dynamic positioning processor; an activity monitoring and recording system processor, communicatively coupled with the monitoring arrangement, which is configured to process the monitored data; at least one tag comprising operator identification; and, a tag interrogating device configured to interrogate the tag to determine the identity of the operator of the dynamic positioning system, and which is configured to record the processed data to the tag; a monitoring arrangement configured to monitor the dynamic positioning data and the data representative of the activity of the operator when controlling the dynamic positioning of the maritime vessel, the dynamic positioning data and data representative of the activity of the operator being communicated to the monitoring arrangement from the at least one dynamic positioning processor; an activity monitoring and recording system processor, communicatively coupled with the monitoring arrangement, which is configured to process the monitored data; at least one tag comprising operator identification; and, a tag interrogating device configured to interrogate the tag to determine the identity of the operator of the dynamic positioning system, and which is configured to record the processed data to the tag; an operator interface comprising: a display screen configured to display the monitored data; and an input device (12b, 12c, 12d) configured to enter control signals by the operator to operate the thrusters of the maritime vessel to counter deviations from a desired position of the maritime vessel over the seabed based on the monitored data; an interface processor which is arranged to receive data from the at least one dynamic positioning processor and display the data on the display screen. a display screen configured to display the monitored data; and an input device (12b, 12c, 12d) configured to enter control signals by the operator to operate the thrusters of the maritime vessel to counter deviations from a desired position of the maritime vessel over the seabed based on the monitored data; an interface processor which is arranged to receive data from the at least one dynamic positioning processor and display the data on the display screen.