What should be checked when a mine rescue team enters smoke for the first time?

When a mine rescue team enters an environment with smoke, it is crucial to check mask seals and the oxygen (O2) cylinder pressure first. This is because proper functioning of respiratory protection is essential for the safety of the team members operating in a smoke-filled atmosphere. Ensuring that the masks fit properly creates an effective seal, preventing toxic smoke and gases from entering the respiratory system. Additionally, verifying the pressure in the O2 cylinders confirms that team members have an adequate supply of breathable air during the rescue operation. This step is critical, as even if the team is prepared for hazards in the area or has functioning equipment, compromised breathing apparatus could lead to severe consequences in an emergency rescue scenario.

Other aspects, such as checking the functionality of equipment or assessing hazards, are indeed important, but ensuring that personal protective equipment operates correctly takes precedence when facing immediate risks associated with smoke inhalation.