Category:Rate of Spread
Rate of Spread (ROS) - The speed at which a fire extends its horizontal dimensions, expressed in terms of distance per unit of time. Generally thought of in terms of a fire's forward movement or head fire rate of spread, but also applicable to backfire and flank fire ROS. Recommended SI units are metres per minute (m/min) and kilometres per hour (km/h) (1.0 m/min is equivalent to 0.06 km/h)).
(CIFFC Glossary of Forest Fire Management Terms)
Rate of spread measurement can be achieved by using one or more of the following methods. Each has advantages or disadvantages and will be utilized according fire behaviour situation, available time and resources.