Hi,

One of the possible causes might be that there are multiple GPS data sources (e.g., GX2200’s built-in GPS receiver and the chart plotter’s built-in GPS receiver). Please check this and leave only one GPS data source active and disable the rest. Multiple GPS data sources might cause the position jumping on the chart plotter and unreliable AIS display.

There is a way you can check the output data from the A032. Connect it to a PC or iphone via WiFi and install OpenCPN to see if sufficient data been received by A032.

Hope this helps.