Maritime navigation and radiocommunication equipment and systems. Class B shipborne equiment of the automatic identification system (AIS). Carrier-sense time division multiple access (CSTDMA) techniques|Electric power systems, Display devices (computers), Performance, Electromagnetic compatibility, Data transfer, Radio equipment, Water transport engineering components, Radiocommunication, Physical testing, Marine instruments, Data input, Environmental testing, Interfaces (data processing), Data transmission, Identification methods, Marine navigation