Search for: [Subject and Keywords = łączność morska] OR [Subject and Keywords = radiokomunikacja morska] OR [Subject and Keywords = GMDSS] OR [Subject and Keywords = DSC] OR [Subject and Keywords = RYA \(Royal Yachting Association\)] OR [Subject and Keywords = Królewski Związek Żeglarski] OR [Title = Radiooperator bliskiego zasięgu SRC \: podręcznik RYA] OR [Creator = Bartlett, Tim]