IEC 62238 pdf download Maritime navigation and radiocommunication equipment and systems – VHF radiotelephone equipment incorporating Class “D” Digital Selective Calling (DSC) – Methods of testing and required test results 1 scope This International Standard covers the minimum requirements for general communicationfor shipborne fixed installations using a VHF radiotelephone incorporating class “D”DigitalSelective Calling. These requirements include the relevant provisions of...