During an indirect attack, which action should be performed?

• A. Open hatches
• B. Lower lighting
• C. Secure ventilation
• D. Increase pump rate

Answer: (C)

Indirect attack focuses on cooling the fire and controlling the air supply rather than directly spraying the flames. The best action is to secure ventilation to starve the fire of fresh air and keep hot gases from spreading to other areas. By isolating the space—closing vents, dampers, and doors—you reduce oxygen flow and keep heat contained, which makes the cooling effect of the water or steam more effective and keeps visibility and safety better for the team working the scene.

Opening hatches would increase the air supply and feed the fire, making suppression harder. Lowering lighting doesn’t address the fire environment, and while increasing the pump rate helps deliver water, securing ventilation is the critical step that enables an indirect attack to work efficiently.