Vessel Monitoring System (VMS) data is the data from the Community's satellite-based fishing vessel monitoring system, which provides data on the position, course and speed of vessels to fisheries authorities at regular intervals.

Measurements by drifting surface buoys. This system is a drifting mooring consisting of a surface buoy fastened to a floating anchor by a cable (trip line, buoy rope). It has to monitor as precisely as possible the water volume in which the floating anchor is immersed. The surface buoys are traced by Argos satellites.