SA GRN Site - Adelaide Airport Location - SA GRN base station observation deck roof of tarmac Sir Richard Willam Drive ADELAIDE AIRPORT Lat/Long -34 56 31 / +138 34 58 Low power (<5w) GRN site designed to provide a local area coverage solution. Data Channel 413.175 Voice Channels 412.4875 412.6750 412.8625 412.9875 413.4125 413.4250 415.9125 416.4125 416.9125 417.4125 417.9125