CLSEMM

that has to be modeled.

The class of emission consists of three parts which can be provided together.

frequency modulation, data transmission speed, frequency deviation
e.g. F1B, 50 Baud, +/- 25 Hz

Which data format should be used? I am not 100% convinced that the settings of a radio receiver on board can be automatically controlled by the ECDIS machine. If we assume that it is possible, than I suggest to use a formatted string (type A?) and the values comma separated like (F1B,50,25). Otherwise a simple string is sufficient.