I got one of these with a boat i purchased and its good and works and is all rigged up to the GPS .
But i don't know how to view, reset or change the MMSI.
Hence i don't know what MMSI would be transmitted in the event of me activating the DSC.
I could take the |XM-DSC off and fit my Standard Horizon that i do have all the info for but if possible i'm trying to avoid any GPS compatibility issues that might arrive and use what's fitted to the boat already.
I have tried every combo of buttons i can think of and held and done prolonged hold and such things to try reset the radio but cant do it,