What does the first letter S stand for in the acronym PASS?

The first letter "S" in the acronym PASS actually stands for "Squeeze the lever." This phrase is part of a safety protocol used primarily for operating a fire extinguisher. The PASS system guides individuals through the steps to effectively use a fire extinguisher in an emergency situation.

By "squeezing the lever," the user is activating the extinguisher to release the extinguishing agent onto the fire. Understanding this initial step is crucial, as it directly leads to controlling and possibly extinguishing a fire. The other options, while related to fire safety, do not specify the correct action associated with the first letter of PASS and therefore do not align with the established protocol for using a fire extinguisher.