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.

In the signal into the A / D converter analog to digital conversion, the final processing of data into the microcontroller, then the output is displayed, and determine whether there is a gas leak.

The data acquisition is composed by signal adjusting circuit, anti-jamming filter circuit, AD converter circuit and a RS232 serial communication circuit.