Marine digital navigation system is practical for broadcasting marine safety information, which is a vital part of a modern Global Maritime Distress and Safety System (GMDSS) and e-Navigation framework. A marine digital navigation system is studied based on Orthogonal Frequency Division Multiplexing (OFDM) modulation technology architecture to test the marine digital navigation system in the Donghai Navigation Safety Administration (DNSA) of China. Marine digital navigation systemis a novel shore-based digital broadcasting system that has an outstanding performance over long distances and works on 495-505 kHz or medium frequencies. Marine digital navigation system is used to broadcast marine safety information and other service information, whose possible forms include messages, texts, binary files, and images and combined navigation, to ships within the coverage of the communication signals by using a one-way downlink broadcast mode, so that marine digital navigation system can be used to update Electronic Navigation Charts (ENC) conveniently. A single marine digital navigation system base-station covering an A2 sea area through networking technology is tested, and the results show that the marine digital navigation system has the advantages of high broadcast rate, strong system compatibility, and low error rate. In the future, the marine digital navigation system will provide important information services for navigation safety.
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