It would be nice if those of us at the flight schools, especially the bigger ones, could meet and have some type of safety seminar to possibly come up with some ideas and just see what everyone else is doing to make sure we are on the same page.
Rockman, this already happens on a monthly or semi-monthly basis. It is called the Arizona Flight Training Workgroup, the website is
www.AFTW.org. The chief pilots from ATCA (Lufthansa), Oxford, TransPac, Air Safety, Westwind, and others get together in the interest of improving communication, sharing training procedures/patterns, and increasing general awareness of other traffic in the practice areas. They even participate in briefings with training coordinators from Luke AFB. The website has tons of good information; I suggest you check it out if you'll be instructing in Phoenix for any appreciable amount of time.
It sounds like maybe the incident today could have been an issue of airplanes reporting on two different frequencies. Perhaps the Air Safety plane was reporting their transition over the Coolidge airport, while the Oxford plane was talking to Casa Grande. There are reports the Oxford plane was practicing the GPS 23@CGZ, which would imply they were in the "no man's land" near AYZUT, the IAF. AYZUT is in a weird place because it is in very close proximity to both Coolidge and Casa Grande. There is also a "South Practice Area" frequency, which means the pilots could have been monitoring any of the three frequencies. Most of the 152s at Air Safety only have one radio, so the Chinese kids only had a 33% chance of being on the same frequency as Oxford. Given these circumstances, See and Avoid would have been the only awareness both aircraft had, and we all know how tough that can be.
This is all speculation, of course. But when you break down the situation it becomes easier to see how it happened. I hate the hold at AYZUT precisely because of its proximity to Coolidge and Casa Grande (and to some extent IWA), since I know there's always a chance I'm reporting on a different frequency than nearby traffic. My guess is AFTW will agree on more standardized reporting procedures in that area, given the volume of local training traffic and transient cross country aircraft.
EDIT: After looking at AFTW.org again, I see there is a specific recommended radio procedure for the GPS 23.