The navigation data converter of ship can output gyrocompass and GPS signals after the data conversion, which just bases on gyrocompass (or GPS) input signal.
文中所设计的船舶导航数据转换器可以只依据一种导航数据，经过数据转换后输出电罗经和GPS两种信号，保证电罗经设备与GPS设备的正常工作。
It is necessary to expand the serial ports, because the signals of the data converter are received and sent through different serial ports.
转换器信号的接收与发送是通过不同串口进行，所以有必要扩展串口来解决串口太少的问题。
It is necessary to expand the serial ports, because the signals of the data converter are received and sent through different serial ports.
转换器信号的接收与发送是通过不同串口进行，所以有必要扩展串口来解决串口太少的问题。
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