Which statement about Flanking Fire is true?

Which statement about Flanking Fire is true?

• A. Burns with the wind
• B. Burns at right angles to the wind
• C. Requires no crew coordination
• D. Is effective in very heavy fuels

Answer: (B)

Flanking fire spreads across the landscape, with the flame front oriented perpendicular to the wind. In other words, it burns at right angles to the wind direction, along the sides of the fire rather than ahead of it. This sideways progression is useful when you’re working a fire line, helping to burn toward the edge of the control line without driving the fire forward too quickly. If the fire were burning with the wind, that would be a head fire—fast-moving and advancing in the wind direction, which is not what flanking fire does. Flanking operations also require coordination with the rest of the firefighting effort to manage line integrity and prevent spot fires along the flank. And fuel type alone doesn’t define flanking fire’s behavior; heavy fuels can slow or change spread for any fire type, so that option isn’t a defining feature of flanking fire.

Flanking fire spreads across the landscape, with the flame front oriented perpendicular to the wind. In other words, it burns at right angles to the wind direction, along the sides of the fire rather than ahead of it. This sideways progression is useful when you’re working a fire line, helping to burn toward the edge of the control line without driving the fire forward too quickly.

If the fire were burning with the wind, that would be a head fire—fast-moving and advancing in the wind direction, which is not what flanking fire does. Flanking operations also require coordination with the rest of the firefighting effort to manage line integrity and prevent spot fires along the flank. And fuel type alone doesn’t define flanking fire’s behavior; heavy fuels can slow or change spread for any fire type, so that option isn’t a defining feature of flanking fire.