What do the two green lights on the SCBA HUD signify?

The two green lights on the Self-Contained Breathing Apparatus (SCBA) Heads-Up Display (HUD) indicate a full cylinder air supply. This visual signal is integral to ensuring that firefighters are aware of their air supply status during operations. Having a full air supply is critical for safety, as it allows firefighters to operate effectively within hazardous environments without the immediate concern of depleting their air supply.

A full air supply enables firefighters to focus on their duties, knowing they have adequate air to perform their tasks and manage any potential emergencies. Understanding the SCBA HUD functions helps enhance situational awareness and safety in the field.

The other options reflect different air supply levels that would not correspond to the two green lights, indicating that this specific HUD function is designed to convey the status of a full cylinder rather than lesser amounts of air.