The flashing of Segment 3 indicates a pressure that is:

The indication that Segment 3 is flashing signifies that the pressure within the SCBA is at a normal level. In typical SCBA operations, a designated segment flashing is utilized to communicate essential information about the system's status to the user. When Segment 3 is illuminated in a flashing pattern, it conveys that the breathing air pressure is within the acceptable range for safe use, ensuring that the wearer can rely on the apparatus without concern about insufficient air supply. Understanding these visual indicators is crucial for assessing the SCBA's operational state, thereby allowing the user to remain safe and effective in hazardous environments.