Final answer:
In AUTO mode, the NO SMKG switch will trigger the cabin no smoking lights to illuminate during takeoff to ensure passenger safety and compliance with the non-smoking policy.
Step-by-step explanation:
With the NO SMKG switch selected to AUTO, the no-smoking lights in the cabin will illuminate with takeoff. This is a safety measure in aviation to ensure that passengers are aware of the non-smoking policy during critical phases of flight such as takeoff and landing. When in AUTO mode, the system will also typically activate the signs when the aircraft reaches a certain altitude to remind passengers not to smoke during the flight.