I could list some of HC's contributions, but that would give him away and I'm not sure if he wishes to remain anonymous or not (contrary to belief, not all of us using nom de plumes are seeking anonymity.)
Frankly I think neither Nick or HC are doing themselves any favours as they seem to see red whenever they clash! Nick; perhaps you could address some of HC's specific concerns, HC, perhaps you could think a little broader than a 20 year old rudimentary system that is far from perfect.
Some comments about AVAD;
is it really desirable to let the pilot inhibit the system before it goes off?
100 ft is too low to warn a pilot who is obviously so situationally unaware (to be there) that he is probably unable to assimilate (or even register) the warning by that stage. It didn't help much in the Fulmar S-76, the Cormorant 332 or the BHL Australia 330J.
For an interesting lesson in CRM, SOPs (or lack of) in automated aircraft, and GPWS saving the day have abrowse through this; some interesting point arise.
http://www.aaib.gov.uk/cms_resources...RW%2010-06.pdf