What is the first step in the PASS procedure for using a fire extinguisher?

The first step in the PASS procedure for using a fire extinguisher is to pull the pin. This action is crucial because it unlocks the extinguisher and allows you to use it effectively. The pin serves as a safety feature to prevent accidental discharge of the extinguisher. Once the pin is removed, you can proceed with the subsequent steps: aiming at the base of the fire, squeezing the handle to release the extinguishing agent, and sweeping from side to side to cover the area of the fire. Understanding the PASS technique is essential for ensuring that you can use a fire extinguisher properly in an emergency.