What type of regulatory equipment is denoted by ACP in the airline industry?

The correct answer is Area Call Panels. These panels are an important piece of communication equipment used within the airline industry, particularly by flight attendants. Area Call Panels are installed in various locations within the aircraft and allow crew members to communicate with one another, especially in terms of managing service and addressing any passenger needs. They function as a signaling system that enhances situational awareness and ensures that the crew can coordinate effectively during the flight.

The other options represent terms that do not accurately match the acronym ACP within the regulatory context of the airline industry. For instance, while an Airborne Communication Platform could refer to communication technologies, it is not recognized under the ACP abbreviation. Aldis Communication Procedures are related to visual signaling typically used in maritime contexts, not aviation. The Automatic Control Panel pertains to aircraft system management but does not align with the designated meaning of ACP in regard to crew communication.