An advanced fishing-monitoring system installed in fishing vessels that integrates a set of components for continuously recording information during fishing trips using video technology. EMS largely consists of cameras integrated with GPS that register exact positions, and sensors that start recording when they detect specific actions on the vessels —such as setting or hauling fishing gear. The camera and sensor systems do not allow external manipulation of data. These systems, if properly designed and installed, can be considered a reliable and accurate method to estimate catches onboard vessels and to independently assess vessel compliance with regulations.