ZCZC HA07 121000 UTC OCT BALTIC SEA NAV WARN 03*XWY SOUTHERN SOUTHEASTERN CENTRAL AND NORTHERN BALTIC GULF OF FINLAND GULF OF RIGA AND SEA OF AALAND* GNSS *IS RADAR AND DGPS INTERFERENCE OBSERVED IN AREA. MARINERS ADVISED TO EXERCISE *AUTION AND BE PREPARED FOR NAVIGATION IMPACTS* *CANCEL BALTIC SEA NAV WARN 026/25 NNNN