Bocche di Bonifacio a - Vessel transporting oil, dangerous chemicals or substances likely to pollute the sea or coastline, are requested not to pass through the Bocche di Bonifacio. b - Navigation in this area is prohibited to ships transporting such cargoes and displaying french or italian flag, or in coastal navigation between two french ports. c - Routeing Measures and a mandatory ship reporting system are set up in the Bocche di Bonifacio (see Sailing Directions).