The Department of Maritime Affairs (DAM) was alerted early on Tuesday morning by the professional fisherman of Monaco of the presence of tree trunks floating in the sea off Portier.
The anti-pollution vessel Vitamar found that there was a considerable amount of floating debris, covering an area of 300 metres by 30 metres. This information was forwarded to the regional operational centre for surveillance and rescue and the decision was taken to close the ports of Monaco to avoid damage to ships.
Thanks to the help of the Monaco Fire Department, the Maritime Police, the Port Operations Company (SEPM) and DAM, anti-pollution dams were quickly installed to protect the Hercule and Fontvieille ports.
Mariners were notified of the closures and the work underway.