I bought a Icom IC-M330G, GPS enabled radio and registered a MMSI number, which I entered in the radio. I tried to test the distress signal a couple of ways (NOT by pushing the Red button!), but using the DSC -Individual-routine-with the USCG MMSI number entered. (003669999) I was able to talk to a very helpful USCG person at 619 278-7031, who sees what DSC calls come to them, right as I send it. They do not respond to individual/routine DSC calls, except for distress/all ships. He said they wait 2 minutes to respond, so the closest vessels can respond first. He gets my MMSI-routine call, but no GPS numbers, and no vessel information with my MMSI number. I have done this 3 times, all the same outcome. My radio shows GPS numbers that are the same as my handheld. Does anyone know of a way to confirm a distress call is working, and sending location info without actually sending a distress call? I also tried the "other DSC" -test for this radio, but do not know what "station" to use for San Diego. Thanks for any/all help!