EN 61023:1993 Marine Speed and Distance Measuring Equipment (SDME) - Operational and Performance Requirements - Methods of Testing and Required Test Results
2007EN 61023:2007 Maritime navigation and radiocommunication equipment and systems - Marine speed and distance measuring equipment (SDME) - Performance requirements, methods of testing and required test results
1999EN 61023:1999 Maritime Navigation and Radiocommunication Equipment and Systems Marine Speed and Distance Measuring Equipment (SDME) - Performance Requirements - Methods of Testing and Required Test Results
1993EN 61023:1993 Marine Speed and Distance Measuring Equipment (SDME) - Operational and Performance Requirements - Methods of Testing and Required Test Results