The ATSB was satisfied with the operator's response to this concern and did not request a response from the Office of the National Rail Safety Regulator. 

The REPCON raised concerns that radio congestion and interference at Port Augusta (YPAG) was due to the aerodrome being on the same multicom frequency (126.7) as multiple other aerodromes, including Port Pirie. While the creation of the Spencer Gulf Broadcast Area on 126.9 has removed some aerodromes from the same frequency as YPAG; Port Pirie remains on the same frequency. In addition, a relatively busy aerodrome in Whyalla, which was previously on a separate frequency to YPAG, is now also on the same CTAF as YPAG and Port Pirie. Occurrence brief AB-2021-017 regarding a near collision…