This map indicates the district breakdown of the Iowa ARRL Section, and the counties that are included in those districts. Additionally, there are simplex frequencies that are listed for each county and district that are used for the individual counties use, as well as mutual aid frequencies that would used in the case of other counties and districts coming into an area to lend assistance in an emergency, or even in larger scale exercises. In a time of emergency and need for/or to assist our neighbors, these frequencies will become invaluable.Â