When must Public Safety Vests (PSVs) be worn by firefighters?

Public Safety Vests (PSVs) are critical for enhancing the visibility of firefighters when they are operating in areas where there is the potential for moving traffic. The correct answer indicates that firefighters must wear PSVs before exiting the apparatus in situations where traffic is present. This requirement is in place to ensure safety, as firefighters are often operating in environments where vehicle movement could pose a risk to their safety. By donning the vest before exiting the vehicle, they increase their visibility to motorists, reducing the likelihood of accidents.

In contrast, the other choices fail to encompass the full scope of situations where visibility is crucial. For example, limiting the requirement to only night hours or dawn and dusk does not account for daytime conditions, where traffic can also be present. Similarly, stating that PSVs are only necessary during fire ground operations neglects the importance of visibility in transit situations. Thus, wearing PSVs in moving traffic situations is essential for ensuring the safety of firefighters and preventing potential accidents.