I am listening the Navtex transmission in 518 KHz. Received some stations… Station : PBK Den Helder from NETHERLANDS COASTGUARD.Frequency : 518 KHzDate: 03.23.2019Time: 22:23 – 22:40 UTCMode : NavtexSINPO : 34444QTH : Den Helder Radio : SDRplay SRPduoAntenna : 20…