Mcmurdo Smartfind S20 questions in Gear Anarchy Posted 18 hours ago 11 minutes ago, us7070 said: Supposedly, it's against FCC regulations for any of the AIS/DSC personal beacons sold in the USA to make an all ships DSC call. It can only make a DSC call to the MMSI that gets programmed and a pre-set DSC "Group" - which you also do through the programming interface. I have never programmed in a group - but i have seen it in the MOB-1 inteface So, if you can't program the unit with an MMSI, it's not clear what DSC call it can make. this document from the MOB-1 website explains the functionality available in different countries https://oceansignal.com/wordpress/wp-content/uploads/MOB1_DSC_Functionality.pdf Yup this is what I thought as well. The MOB-1 is a great device, but sadly, this is not one of those. I had never seen one of these before and I can't figure out just what it does.