What immediate action should be taken when using a fire extinguisher according to the PASS method?

The PASS method is a widely recognized approach for safely using a fire extinguisher, and the first step is to pull the pin. This action disengages the locking mechanism on the extinguisher, allowing you to activate it. Pulling the pin is crucial because it prepares the extinguisher for use; without this step, the device will not function properly.

Following this step, the method instructs users to aim the nozzle at the base of the fire, squeeze the handle to discharge the extinguishing agent, and sweep side to side to cover the area of the flames. Each step of the PASS method is designed to effectively eliminate the fire while ensuring the safety of the user. Thus, understanding and correctly executing the first action of pulling the pin is essential in a fire emergency situation.