Which is not one of the three factors to consider when approaching a rescue scene safely?

• A. Call for needed assistance
• B. Hazard identification
• C. Scene size-up
• D. Air supply

Answer: (A)

When approaching a rescue scene safely, you base your actions on evaluating conditions and your ability to operate without putting yourself or others at risk. The three factors you actively consider in that initial approach are hazard identification, scene size-up, and your air supply. Hazard identification means quickly spotting dangers such as unstable structures, potential for collapse, hazardous materials, or downed power that could affect entry and egress. Scene size-up is the overall assessment of current conditions, what needs to be done, where victims might be, and what resources will be required. Air supply focuses on ensuring you have enough breathing air to complete the tasks you plan and monitoring your cylinder so you don’t run out while operating inside the danger area.

Calling for needed assistance is essential for getting additional resources, but it’s a separate action—part of incident management and coordination rather than one of the three factors guiding your safe approach. It’s something you do to support safety and operations, not a component of the hazard-identification, overall scene assessment, or air-containment considerations you use to approach the scene safely.