What on earth is a Fitter message??
Think Twitter! A Fitter message is a short text like message which can be uploaded to the satellite, and which can be rebroadcast several times evey 10 mins or so. It will continue to be broadcast until such time as it is replaced by a new Fitter Msg.
So such a message could be something like
Greeting to xyz school, which will be hosting GB4FUN on xyz Date. We hope you receive this msg OK!
There will be space for a total of nine such Fitter Messages.