I set up a favorites list in order to listen various organizations that will give me information about the military in Houston building hospitals, offering logistical support, etc. I would like to select this favorites list and apply the Discovery feature to it to look for more stations and frequencies that may be operating as well. I cannot get the Discovery feature to launch from Sentinel and when I try to use Discovery from the radio, it tells me the system name is incorrect. I've tried using the name of my favorites list and have tried using the names of the organizations within it. I have had no luck. I've had similar problems trying to use Discovery with the Sheriff's Department. Either Discovery does not do what I think it does or I am missing something pretty major. Thanks.