Final answer:
The Control board system relies on an Accountability Officer to monitor personnel air supply using SCBA readings and ensures teams exit safely before air supplies run out.
Step-by-step explanation:
The personnel accountability system that uses an Accountability Officer to track expected exit times based on the pressure of the team's lowest Self-Contained Breathing Apparatus (SCBA) reading is known as the Control board system.
This system often includes a command board or control board where the Accountability Officer can visually track the location and air supply of all teams in the hazardous area. Each team's air supply is monitored, and the officer calculates the team's remaining working time inside the hazardous area to ensure that all team members can exit safely before their air supply reaches critical levels. The key aspect of the Control board system is the proactive management of personnel within a dangerous environment to maintain a high level of safety.