REPCON supplied the following information to CASA as requested
Answers to your questions as follows:
Yes it was CTAF operations at the time.
No answer on this.
Aircraft 1 was IFR and had made the required broadcast on area frequency, but as the other aircraft were VFR no broadcasts were made on the area frequency – nor were they required to be.
Both aircraft had been in communication before the incident. Both had made broadcasts on the CTAF that they were taxiing and the reporter (aircraft 1) states that they broadcasted an entering and line up call for runway 28 and visually checked the…