Thank you for your answer. I think I did a mistake when trying to decoding it because I got, with the help of the document to translate the ASCII into actual 6-bits frames.
000001 001000 11
Wich gives me 1, so the message type you gived,
But then S. Which is false as far as it isn't even a number.
The following one isn't even 0
The numbers you find actually being those of my mmsi's, can you tell me how did you did it?