What does DAC stand for in aviation terminology?

The correct definition of DAC in aviation terminology is "Dynamic Airspace Control." This term refers to the methods and processes involved in managing airspace effectively to accommodate various flight operations, ensuring that air traffic is organized and safe. Dynamic Airspace Control involves adapting to changing flight conditions, needs of air traffic, and operational requirements, which is essential in modern airspace management where flexibility and responsiveness are crucial.

The other options do not accurately represent commonly used aviation terminology. The meanings of "Designated aviation Channeler," "Direct aviation Coordinator," and "Department of Aeronautics Communication" do not align with established aviation concepts or practices, and thus, they are not relevant in the context of DAC in aviation.