ADRS 6 ADMIRALTY DIGITAL RADIO SIGNALS VOL 6

Computer software for marine navigation featuring hydrographic, oceanographic, navigational, maritime safety, maritime telecommunications data and information and tidal height and motion predictions; downloadable computer software for marine navigation featuring hydrographic, oceanographic, navigational, maritime safety, maritime telecommunications data and information and tidal height and motion predictions; downloadable electronic publications in the nature of charts, books and manuals featuring hydrographic, oceanographic, navigational, maritime safety, maritime telecommunications, light and fog signal data and information and tidal height and motion predictions; computer software for authorising access to data bases featuring hydrographic, oceanographic, navigational, maritime safety, maritime telecommunications data and information and tidal height and motion predictions