While China had the highest number of incidences of AIS gaps, the report notes that the Spanish fleet went dark three times as often as the Chinese fleet, and that they spent nearly twice as long with no AIS signal as they did visibly fishing.
The report also documents that more than 30% of dark vessels eventually traveled to the Port of Montevideo in neighboring Uruguay, a location favored by those involved in illegal fishing. It also notes that more than half of the dark vessels engaged with other ships at sea, most likely to transfer illegally caught fish without needing to go to port.