The error originates from the coast guard’s software.The standard of AIS Class B for pleasure boats has been realized in 2006. We know that some older AIS Class A ships have problems with the Class B transmissions. It is only a matter of time until the older Class A update their software. If the coast guards ask you again about that problem, you can show them the certifications number which you can find in the manual. It is the number BSH / 46162 / 4320638 / 07 and says that the unit is legal.