What is the interior fire stream/ventilation high-yield approach?

• A. Do not ventilate to preserve heat.
• B. Use hydraulic ventilation to remove steam/smoke early; apply short, straight streams overhead to inhibit flashover.
• C. Use wide fog streams at low elevation; avoid overhead ventilation.
• D. Ventilate only after the fire is fully suppressed.

Answer: (B)

The key idea is to combine interior heat/smoke removal with targeted extinguishing from overhead to maximize control of the fire early. Hydraulic ventilation uses the force of water streams to push smoke and hot gases out through openings, cooling the space and breaking up the hot ceiling jet. Pairing that with short, straight streams directed overhead delivers a concentrated cooling effect to the upper layer, rapidly reducing heat and inhibiting flashover. In an aircraft interior, this approach clears visibility, reduces thermal layering, and allows crews to move in more safely and effectively. Waiting to ventilate or using low, wide streams can push heat downward, obscure visibility, or waste valuable time before the fire is under control.