safelife, regarding the airbus I'll disagree with your statement. Limitations are very clear
CATEGORY II AUTOMATIC APPROACH WITHOUT AUTOMATIC LANDING
Minimum decision height: 100 ft.
One autopilot at least must be engaged in APPR mode and CAT 2 or CAT 3 SINGLE or CAT 3 DUAL capability must be displayed on FMA. Minimum height for AP disconnection: 80 ft.
CATEGORY II AUTOMATIC APPROACH WITH AUTOMATIC LANDING
Minimum decision height: 100 ft.
One autopilot at least must be engaged in APPR mode and CAT 2 or CAT 3 SINGLE, or CAT 3 DUAL capability must be displayed on FMA.
Airbus saying you may do so must come in form of exceptional approval or TR to the manual. NO such TR has been issued till today.
