Skip to main content

NWCG Glossary of Wildland Fire, PMS 205

Overview

The NWCG Glossary of Wildland Fire provides an extensive listing of approved terms and definitions used by the NWCG community. It contains terms commonly used by NWCG in the areas of wildland fire and incident management and is not intended to list all terms used by NWCG groups and member agencies. The NWCG has directed that all committee and subgroup product glossaries be contained within the NWCG Glossary of Wildland Fire to maintain definition consistency and clarity among documents.

Comments, questions, and recommendations shall be submitted to the appropriate agency program manager assigned to the Data Standards and Terminology Board (DSTB). 

NWCG Glossary of Wildland Fire, PMS 205  (Quick View)

EDG Explorer is a database platform used for managing NWCG Glossary terms.  The following table is a quick view of the terms found in EDG. More detailed information such as rules, documentation, and term relationships may be viewed in EDG Explorer.  

Note: If the NWCG Glossary of Wildland Fire is not displaying below please report it to NWCG Webmaster

Title Steward Status Definition
latitude (Point of Origin) (POO) Approved

The latitude location of the point of origin specified in decimal degrees. Point of origin is the location where a competent ignition source came into contact with the material first ignited and sustained combustion occurred.

law enforcement CEPC Communication, Education, and Prevention Committee In Development
law enforcement (internal) (event) NCSC National Coordination System Committee Approved

An event dealing with the agency's law enforcement program. Includes non-fire infrared flights, surveillance, etc.

lead line NIAC National Interagency Aviation Committee Approved

Line or set of lines made of rope, webbing, or cable and used in helicopter external load operations; usually placed between a swivel or the cargo hook and the load.

leader NIMSIC National Incident Management System Integration Committee Approved

The ICS title for an individual who is responsible for supervision of a unit, strike team, resource team, or task force.

leaders intent LC Leadership Committee Approved

A concise statement that outlines what individuals must know in order to be successful for a given assignment. The intent communicates three essential pieces of information:

Task - What is the goal or objective
Purpose - Why it is to be done
End state - How it should look when successfully completed

leadership LC Leadership Committee Approved

The art of providing purpose, direction, and motivation to a group of people in order to accomplish a mission and improve the organization. Leaders provide purpose by clearly communicating their intent and describing the desired end state of an assignment to their followers. Leaders provide direction by maintaining standards of performance for their followers. Leaders provide motivation by setting the example for their followers. 

leadplane NIAC National Interagency Aviation Committee Approved

Aircraft with pilot used to make trial runs over the target area to check wind, smoke conditions, topography and to lead airtankers to targets and supervise their drops.

leakage rate MFES Mobile Fire Equipment Subcommittee Approved

The amount of water seeping through a sample hose (unlined) in a special trough in a given time period.

leapfrog method IOSC Incident Operations Subcommittee Approved

A system of organizing workers in fire suppression in which each crew member is assigned a specific task such as clearing or digging fireline on a specific section of control line, and when that task is completed, passes other workers in moving to a new assignment. 

Learning Content Management System (LCMS) IPSC Incident and Position Standards Committee Archived

Any system that keeps learner information, can launch and communicate with SCOs, and can interpret instructions that tell it which SCO comes next.

Learning Management System (LMS) TDC Training Delivery Committee Approved

A learning management system (LMS) is a computer-based operating system used by training organizations to register, track and monitor activity in the training function. LMSs have evolved from earlier systems to now include course and student monitoring, resource management, assessments, completion rates and more.

learning objective IPSC Incident and Position Standards Committee Archived

A description of the intended outcome of a training class, program, or evolution. The learning objective identifies the condition, the task, and the standard to which the student much achieve.

learning objects IPSC Incident and Position Standards Committee Archived

Reusable learning objects represent an alternative approach to content development. In this approach, content is broken down into chunks. From a pedagogical perspective, each chunk might play a specific role within an instructional design methodology. Such chunks are called learning objects. There is no standard for the size (or granularity) of a learning object. Larger learning objects are typically harder to reuse, and smaller learner objects save less work for those who reuse them. Normally the happy medium has been estimated as between five and fifteen minutes of learning material. The requirements for each chunk are:

Each chunk must be able to communicate with learning systems using a standardized method that does not depend on the system.
What happens within a chunk is the chunk's business.
How a learner moves between chunks is controlled by the learning system.
Each chunk must have a description (metadata tag) that enables designers to search for and find the right chunk for the right job.

legend IPSC Incident and Position Standards Committee Approved

A key accompanying a map which shows information needed to interpret that map. Each type of map has information represented in a different way relating to its subject matter. The legend can explain map scales, symbols and color.

legitimate smoke FUSC Fire Use Subcommittee Approved

Smoke from any authorized use of fire (e.g., locomotive, industrial operations, permitted debris burning).

level of certainty WFISC Wildland Fire Investigation Subcommittee Approved

Describes how strongly a fire investigator holds an opinion or conclusion, includes two levels, Possible and Probable.

level of service IFPC Interagency Fire Planning Committee Approved

Amount of fire prevention and fire suppression supplied; may be expressed several ways (e.g., percent of people or buildings protected, area protected, dollar value of property protected, firefighters per capita, water flow capability).

license plate number ETC Equipment Technology Committee Approved

The vehicle’s license plate number for purposes of identifying equipment.

licensed physician EMC Emergency Medical Committee Approved

A physician licensed by a state Board of Medicine to practice medicine or surgery in that state.

licensure EMC Emergency Medical Committee Approved

The permission granted by a state as a property right to an individual to practice a profession.

life-safety RMC Risk Management Committee Approved

Refers to the joint consideration of both the life and physical well-being of individuals.

lifting processes FWS Fire Weather Subcommittee Approved

Any of the processes that lead to upward vertical motion in the atmosphere. These processes may include low level convergence, heating or thermal convection, orographic lifting over the mountains, and frontal lifting.

light (fine) fuels FBSC Fire Behavior Subcommittee Approved

Fast-drying fuels, generally with a comparatively high surface area-to-volume ratio, which are less than 1/4-inch in diameter and have a timelag of 1 hour or less. These fuels readily ignite and are rapidly consumed by fire when dry.

light duty level RMC Risk Management Committee Approved

Light duty mainly involves office-type work with occasional field activity characterized by light physical exertion requiring basic good health.  Individuals almost always can govern the extent and pace of their physical activity.  Essential functions include, but are not limited to: climbing stairs, standing, operating a vehicle, and long hours of work, as well as some bending, stooping, or light lifting.

light wind FWS Fire Weather Subcommittee Approved

Wind speed less than 7 mph (6 knots) measured at 20 feet above ground. At eye level, light winds are less than 3 mph (3 knots).

lighter/matches CEPC Communication, Education, and Prevention Committee In Development

Common tools used to ignite cigarettes, cigars, campfires and other items.

lighting (aviation obstruction) Approved

Indicates if the aviation obstacle is lighted.

lightning CEPC Communication, Education, and Prevention Committee In Development
Lightning Activity Level (LAL) FDSC Fire Danger Subcommittee Approved

A number, on a scale of 1 to 6, which reflects frequency and character of cloud-to-ground lightning (forecasted or observed). The scale for 1 to 5 is exponential, based on powers of 2 (i.e., LAL 3 indicates twice the lightning of LAL 2). LAL 6 is a special category for dry lightning and is closely equivalent to LAL 3 in strike frequency. 

lightning fire FWS Fire Weather Subcommittee, WFISC Wildland Fire Investigation Subcommittee Approved

Wildfire caused directly or indirectly by lightning.

lightning fire occurrence index FDSC Fire Danger Subcommittee Approved

Numerical rating of the potential occurrence of lightning-caused fires.

Lightning Risk (LR) FDSC Fire Danger Subcommittee Approved

A number related to the expected number of cloud-to-ground lightning strokes to which a protection unit is expected to be exposed during the rating period. The LR value used in the occurrence index includes an adjustment for lightning activity experienced during the previous day to account for possible holdover fires. 

lightning risk scaling factor FDSC Fire Danger Subcommittee Approved

Factor derived from local thunderstorm and lightning-caused fire records that adjusts predictions of the basic lightning fire occurrence model to local experience, accounting for factors not addressed directly by the model (e.g., susceptibility of local fuels to ignition by lightning, fuel continuity, topography, regional characteristics of thunderstorms). 

lightning stroke counter FWS Fire Weather Subcommittee Approved

Electronic sensor used to record the number of lightning strokes within a predetermined range over a specified period of time.

lightweight debris WFISC Wildland Fire Investigation Subcommittee Approved

Ash and other materials found on other remains at a fire scene which have a tendency to settle on top of the other objects.

limbing HTTFS Hazard Tree and Felling Subcommittee Approved

Removing branches from a felled or standing tree, or from brush.

limitations (water source) Approved

Limitation of the water source like duration of use, seasonality, slow refill, must have specific size screen on draft hose, etc.

limited containment IOSC Incident Operations Subcommittee Approved

Halting of fire spread at the head, or that portion of the flanks of a prescribed fire that is threatening to exceed prescription criteria, and ensuring that this spread rate will not be encountered again; does not indicate mopup.

line cutter IOSC Incident Operations Subcommittee Approved

Fire crew member in the progressive method of line construction who cuts and clears away brush, small saplings, vines, and other obstructions in the path of the fireline; usually equipped with ax or brush hook, or pulaski.

line date time FRSC Fire Reporting Subcommittee Approved

The date and time that the fire perimeter was collected in the field.

line officer ICSC Incident Command Subcommittee Approved

Managing officer, or designee, of the agency, division thereof, or jurisdiction having statutory responsibility for incident mitigation and management.

line scout IOSC Incident Operations Subcommittee Approved

A firefighter who determines the location of a fire line.

lined fire hose ETC Equipment Technology Committee Approved

Fire hose with a smooth inner coating of rubber or plastic to reduce friction loss.

lined hose MFES Mobile Fire Equipment Subcommittee Approved

A hose that is lined with a tube of petroleum-based thermoplastic or polyester elastomer.

liner MFES Mobile Fire Equipment Subcommittee Approved

The innermost continuous petroleum base, thermoplastic, polyester elastomer element of fire hose.

Liquid Concentrate (LC) ETC Equipment Technology Committee Approved

Liquid phosphate fertilizers used as fire retardants, usually diluted three to five times prior to application.

litter FUSC Fire Use Subcommittee Approved

The top layer of forest floor, composed of loose debris of dead sticks, branches, twigs, and recently fallen leaves or needles; little altered in structure by decomposition.

little change FWS Fire Weather Subcommittee Approved

Insignificant change in wind speed, direction, and temperature (less than 5 degrees) and relative humidity (less than five percent), respectively. When used as a general statement in a long-range forecast, all four criteria apply.

live fuel moisture content FDSC Fire Danger Subcommittee Approved

Ratio of the amount of water to the amount of dry plant material in living plants.

Displaying 1601 - 1650 of 2942

How to Print or Download Glossary of Wildland Fire, PMS 205

Last Modified / Reviewed:

NWCG Latest Announcements