What foam application technique directs foam to the ground near the front edge of a burning liquid pool?

The roll-on method is a foam application technique that effectively directs foam towards the ground at the leading edge of a burning liquid pool. This technique involves rolling the foam across the surface of the burning liquid, allowing it to spread out and create a blanket that smothers the fire. The foam's movement towards the fire helps suppress flames by cutting off the fire's access to oxygen and creating a barrier between the burning liquid and the surrounding air.

This method is particularly useful in cases where flammable liquids are involved, as it allows for an efficient and effective application of foam while minimizing the risk of disturbing the fuel that is on fire. The foam's blanket also serves to expand and cover the area, creating a protective layer that can prevent re-ignition after the flames are suppressed.