I tend to support FrontLeftHampster on this. See and avoid is unrealistic. Flying an aircraft especially single pilot will sadly mean that he will have to not only be looking out but within too.
Especially on approach the commander will be selecting flap and gear, checklists and approach plates as well as scanning instruments.
Even looking out in certain light and angles its likely that he will not see another aircraft.
GA is the poor man in aviation. More and more airspace is being put over to IFR traffic and VFR is being squeezed into less and less space.
Even with the best controllers offering RIS how many times are aircraft missed?
I was flying around London a few years ago as a safety pilot into sun in a 172 around London. The controller who was giving us an RIS missed an aircraft coming out of the sun towards us. I was looking up some frequences. When I looked up another aircraft passed within 12 feet over the top of us. So close I could see the tread on the tyres.
The Cirrus has a ballistic Parachute system. Maybe all aircraft should have transponders, Maybe all singles should have ballistic parachute systems and maybe maybe all twins and above should have TICAS fitted.
We have all been there where an aircraft got too close or was missed for some reason. This was unlucky but it will happen again.
Pace