Which step comes first in the PASS acronym for using a fire extinguisher?

The first step in the PASS acronym for using a fire extinguisher is to pull the pin. This critical action is essential because it unlocks the extinguisher and allows the user to operate it. The pin is designed to ensure safety by preventing accidental discharge. Only after pulling the pin can the user proceed to the next steps—aiming the nozzle at the base of the fire, squeezing the handle to release the extinguishing agent, and sweeping it back and forth to effectively cover the area of the fire. By following this sequence, the user ensures they are prepared to combat the fire effectively and safely.