Just to expand a little. Your agency isn't going to be heard on every tower in the state, there wouldn't be enough frequencies on the towers to carry all the traffic on every talkgroup. But, if you take your portable around the state, you will be able to hear your agency and talk back to them. Scanner users around the state who have never heard your agency would begin hearing it as you moved around the state and then would no longer hear it as you moved away from the site.
Mike