What does ELS represent in emergency procedures?

ELS stands for Emergency Light System, which is crucial in emergency procedures as it ensures visibility during critical situations, such as power outages or evacuations. The system activates emergency lighting to guide passengers and crew safely to exits, enhancing their ability to navigate potentially hazardous conditions.

While the other options mention systems related to emergencies, they either do not accurately define the acronym ELS or are associated with components that are not standard in emergency protocols. Understanding the function of the Emergency Light System emphasizes the importance placed on passenger safety during emergencies on an aircraft.