Dick
I absolutely support the trial, your suggestion has opened my mind
Let's have some ADS-B equipped and TSO 146 equipped subsidised aircraft conduct a trial at Proserpine.
We will all need an open mind if the results demonstrate the pilots can do it without mummy ATC changing their nappies - as it will throw your case out the window.
LHR
How many alarms do you think the suggestion would create on -say - Owen's screen? Perhaps Owen can give an estimate?
Remember the boy crying wolf? There is a limit to the amount of alarms repetitively occurring before stress levels go overboard and/or alarms lose their credibility.
Why not have one alarm under the supervision of one (or two) pilots? It's called a TSO 146 GPS with terrain assistance and a map of where you are at what height - RAIM alarm of course being one alarm of note.