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types | fuels | terms | the science of fire

Glossary of Terms

AIR TACTICAL GROUP SUPERVISOR - coordinates all airplane and helicopter tactical operations on an incident.
AIR TANKER - any fixed wing aircraft certified by FAA to transport and deliver fire retardant solutions.
ANCHOR POINT - a barrier to fire spread from which fire line construction begins.
BACKFIRE - setting a fire in front of a wildfire to burn up fuel in the path of the advancing flame front and/or to change direction of the force of the fire's convection column.
BARRIER - an area without flammable fuels, e.g., constructed fire line, rock slides, roads, lakes, rivers, etc.
BLOW UP - sudden increase in fire intensity or spread.
BURNING OUT - setting a fire inside a control line between the fire and the control line to remove unburned fuels. Considered a normal part of line construction. Reinforces the control line. (FIRING OUT)
COLD TRAILING - inspecting for and extinguishing all hot spots along the edge of a control line.
CONFINE A FIRE - restrict a fire to within specific boundaries determined either prior to or during a fire. Uses natural barriers or topographic features.
CONTAIN A FIRE - to take needed fire suppression action to stop the fire's spread under prevailing conditions.
CONTROL A FIRE - to complete a control line around the full perimeter of a fire includes any spot fires, interior unburned islands, burn out any unburned area adjacent to control line, cool down hot spots next to control line until the lines can be expected to hold under foreseeable conditions.
CONTROL LINE - all constructed or natural fire barriers and treated fire edge used to control a fire.
CROWN FIRE - a fire that spreads through the tops of trees or shrubs independent of the ground surface fire.
CROWN OUT - a fire that rises from the ground into the tops of vegetation and spreads through the tops of trees. To intermittently ignite the crowns as surface fire advances.
DIRECT ATTACK - building a fire line by wetting, smothering or physically separating the burning fuel from unburned fuel. Usually done by hand crews, engines or tractors directly on the fire edge.
DEFENSIBLE SPACE - a cleared area around a structure which allows firefighters to safely defend the structure from an advancing fire.
ESCAPED FIRE - a fire which exceeds the capability of the initial action resources.
FIRE STORM - violent updraft caused by a large continuous area of intense fire. Creates violent surface indrafts near fire perimeter and often with tornado like winds. Destructive surface winds.
FLASHOVER - rapid combustion or explosion of unburned gases trapped as a result of poorly ventilated topography.
FLANKS OF FIRE - the edges of a fire which is parallel to the main direction of fire spread. The sides of the fire looking from the point of origin towards the head.
FUEL TYPE - identifiable fuel elements of distinctive species, form, size, arrangement or other characteristics which cause a predictable rate of fire spread under specified weather conditions.
HAND CREW - individuals trained for firefighting that are brought together to work as an organized crew on a fire.
HEAD OF FIRE - the most rapidly spreading portion of a fire.
HELIBASE - the main location for parking, fueling, maintaining and loading of helicopters, usually near the Incident Base.
HELIRAPPELER - a firefighter delivered to a fire by helicopter who rappels from the helicopter down ropes to ground.
HELISPOT - temporary landing spot for helicopters, usually remote and unimproved.
HELITANKER - helicopter equipped with a bucket or fixed tank to deliver water or retardant to a fire.
HOT SHOT CREW - highly trained firefighting crew used to construct fireline with handtools. Organized for full time firefighting.
HOTSPOT - an extremely active part of a fire.
ICS - Incident Command System, an organization with a common structure with responsibility for the management of all aspects of an incident.
INCIDENT - an occurrence or event that requires action by emergency service personnel. (fire, flood, earthquake, hurricane, volcanic event, etc.)
INCIDENT BASE - the location where firefighters are provided food, lodging and supplies.
INCIDENT COMMAND POST - location where primary command functions are executed. Usually located at the Incident Base.
INITIAL ACTION - (INITIAL ATTACK) fire control work by first firefighters arriving at a fire.
INCIDENT MANAGEMENT TEAM - a group of highly trained individuals organized as a team to manage an incident using the Incident Command System.
LEAD PLANE - aircraft flown to direct tactical operations of Air Tankers.
MOPUP - extinguishing burning fuels inside the control lines.
OPERATIONAL PERIOD - a scheduled period of time to accomplish planned objectives and fire control operations. Planned time period is usually 12 to 24 hours.
PATROL - watching an assigned portion of control line to prevent fire from becoming active and escaping to the unburned fuels outside the line.
PRESCRIBED FIRE - any fire ignited by management actions to meet specific objectives. (Prescribed Burn)
RATE OF SPREAD - the rate of increase in the fire size through forward rate of spread at the head of the fire or rate of increase in area. Expressed in chains per hour(66 ft) or acres per hour.
RUNNING FIRE - rapidly spreading fire with a well defined head.
SCRATCH LINE - unfinished control line hastily constructed to check the spread of a fire.
SMOKEJUMPER - a firefighter delivered to a fire by airplane who parachutes to the ground.
SMOLDERING - fire burning without flame and barely spreading.
SNAG - standing dead tree or part of a dead tree.
SPOT FIRE - fire outside the perimeter of the main fire started by flying embers, sparks or rolling debris.
SPOTTING - sparks or embers carried by the wind starting new fires ahead of the main fire.
SURFACE FIRE - fire that burns the litter, debris and small vegetation on the ground.
TRENCH - small ditch constructed on sloping ground to catch rolling material.
UNDERSLUNG LINE - (UNDERCUT) a fire line or control line below a fire on a slope.
UNIFIED COMMAND - A command structure which allows all responsible agencies or individuals to jointly manage an incident through a common set of objectives.
WILDLAND FIRE - any non-structure fire, other than prescribed fire, that occurs in the wildland.
WILDFIRE - an unwanted wildland fire.

-taken from http://www.fs.fed.us/r6/siskiyou/fireterm.htm

 

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