A SECURITY ZONE HAS BEEN ESTABLISHED ON PORTIONS OF THE DELAWARE AND SCHUYLKILL RIVERS IN THE VICINITY OF THE PHILADELPHIA INTERNATIONAL AIRPORT. LAW ENFORCEMENT VESSELS WILL BE MONITORING THE BOUNDARIES OF THE SECURITY ZONE. THE SPECIFICS OF THESE BOUNDARIES CAN BE FOUND IN 33 CFR 165.558. THE SECURITY ZONE WILL BE ENFORCED INTERMITTENTLY FROM 4 PM THROUGH 7 PM ON SEPTEMBER 15, 2020. ON SCENE ENFORCEMENT VESSELS CAN BE CONTACATED VIA VHF-FM CHANNEL 22. MARINERS ARE ADVISED TO EXERCISE CAUTION AND OBEY ALL COMMANDS FROM ON SCENE ENFORCEMENT VESSELS WHEN IN THE AREA.