船载，设定航行方向，根据航行的实时角度，给出偏移量，并可以显示左偏还是右偏，为舵手提供方向参考。程序主要包含串口通信、图表显示，在VS2013环境下开发。-Ship, set sail direction, based on real sailing angle, offset is given, and can display the left side or right side, as the helmsman to provide direction reference. Program