What is the first step in using a fire extinguisher according to PASS?

The first step in using a fire extinguisher, according to the PASS technique, is to pull the pin. This action is crucial because it allows the user to unlock the extinguisher and enable it for operation. The pin serves as a safety device that prevents accidental discharge, ensuring that the extinguisher can only be activated when intentionally used.

Understanding this step is important for several reasons. It ensures that the person using the extinguisher is prepared to handle the device properly before aiming it at the fire. Taking this initial action sets the stage for the subsequent steps in the PASS method—aiming the nozzle, squeezing the handle, and sweeping the base of the fire—all of which are essential for effectively extinguishing the flames. Without following the first step, no further actions can safely occur since the extinguisher will remain in a locked position.