=============== Position alerts =============== The ``Position alerts`` flow detects whether any vessel emitted VMS data that matches the specified detection parameters on : * flag state * area of detection * whether to detect all positions or only positions with fishing activity (as detected by the :doc:`enrich positions flow `) * fishing gear (from logbook data and :doc:`vessel-profiles`) * species (from logbook data) * time window (specified by a number of hours preceding the present time) * depth (based on bathymetry data from https://emodnet.ec.europa.eu at the position of the VMS point) * list of vessels (specified by their district, producer organization or individually) The detected vessels are loaded to the ``pending_alerts`` table.