Multp
I don’t have an answer to your question, but when you do find a definition I shall be very interested to see what it says!
o My first thought is reaction to what?
o A light coming on which you are waiting
for with your finger already on a button
to indicate your “reaction” (my guess
0.2 sec or less)
o An unexpected big bang (my guess 1 sec
plus)
In my day Boscombe insisted on a two second delay before taking action to show that an aircraft could be controlled following a failure such as autopilot/autostab hard over or an engine failure. (my feeling is that was not a bad every day assumption for a totally unexpected event happening during routine flight)
Surely a guy about to launch off a catapult at sea (for example) is in a different state of arousal to a skipper turning to welcome a visitor to the flight deck two hours into the cruise. And there must be quite a few states between such extremes.
JF