说明：  AIS数据的解析，包括功能码：1、2、3、5，AIS信息包含：MMSI编号、航行状态、转向率、对地航速、船位精确度、经度、纬度、对地航向、船舶艏向等
(AIS data analysis, including the function code: 1, 2, 3, 5, AIS information includes: the MMSI number, navigation status, to rate, on the ground speed, position accuracy, longitude, latitude, of course, the vessel s heading to.)