General questions for interest.
Which aircraft (Cat3) have a 'No Flare' alert / warning.
If an alert (amber caution); what triggers the annunciation, i.e. how does the system know if the aircraft will not flare, and when.
If a warning (red), either at flare initiation or later, what triggers the annunciation.
Will either an alert or warning trigger a 'No Autoland' warning and/or disengage the autoflight system (op question #1).
What is the recommended procedure for a 'No Flare' warning, i.e. at or below flare height. Whats the purpose of 'No Flare'.
Influencing thoughts; if an aircraft has sufficient redundancy to operate with an alert height, - carry on and land with any failure, then how can a system with 'no flare' failure qualify as having sufficient redundancy.
Alternatively, if the Cat3B capability is provided by a hybrid autopilot / HUD flight director - if autos fail use HUD, then the system would not qualify to use an alert height because of pilot intervention, and thus requires a decision height.
How might a HUD provide flare guidance when the autopilot cannot - considering symbology vice sensor based computation.