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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
All Terrain Vehicle (ATV) ETC Equipment Technology Committee Approved

Any motorized vehicle designed for or capable of cross-country travel on or immediately over land, water, sand, snow, ice, marsh, swampland, or other terrain.

all-lead projectile CEPC Communication, Education, and Prevention Committee In Development
alligatoring CEPC Communication, Education, and Prevention Committee Approved

Char patterns formed on paint or burned wood remains, usually in the shape of blisters.

allocated resources IBC Incident Business Committee Archived

Resources dispatched to an incident, that have not yet checked in.

allowable payload NIAC National Interagency Aviation Committee Approved

The amount of weight that is available for passengers and/or cargo. On the load calculation form it is the operating weight subtracted from the selected weight.

altimeter setting NIAC National Interagency Aviation Committee Approved

The barometric pressure reading used to adjust a pressure altimeter for variations in existing atmospheric pressure or to the standard altimeter setting (29.92) inches.

ambient air FWS Fire Weather Subcommittee Approved

According to the American Meteorological Society, background, environmental, or surrounding air.

ambulance RMC Risk Management Committee Approved

A ground transport vehicle configured, equipped and staffed to respond, care for and transport a patient(s) and approved by a state to do.

ambulate EMC Emergency Medical Committee Approved

To move from place to place, walk.

anaphylaxis EMC Emergency Medical Committee Approved

Hypersensitivity (as to foreign proteins or drugs) resulting from sensitization following prior contact with the causative agent.

anchor point IOSC Incident Operations Subcommittee Approved

An advantageous location, usually a barrier to fire spread, from which to start constructing a fireline. The anchor point is used to minimize the chance of being flanked by the fire while the line is being constructed.

anemometer FWS Fire Weather Subcommittee Approved

According to the American Meteorological Society, the general name for instruments designed to measure total wind speed.

angle GSC Geospatial Subcommittee Approved

Angle of point symbol displayed in mapping application

animal contact CEPC Communication, Education, and Prevention Committee In Development

Power: Simultaneous contact, or arching, between an animal and electrical equipment, either phase-to-phase or phase-to-ground, resulting in electrocution and short circuits.
Other: An ignition that occurs when a wild or domestic animal makes contact with electrical equipment such as a power line or electric fence.

annual certification IPSC Incident and Position Standards Committee Approved

Annual review by an employing agency of an individual's position qualifications and documentation certifying that the individual is fully qualified to perform duties and responsibilities for a specified position. Annual certification is based on established performance standards and agency specific requirements. 

Annual Operating Plan (AOP) [fire weather] FWS Fire Weather Subcommittee Approved

A procedural guide which describes fire meteorological services provided within the Geographic Area of responsibility, including the National Interagency Fire Center. The guide is based on the National Interagency Agreement and applicable Geographic Area Memorandum of Agreement. 

annual plant FDSC Fire Danger Subcommittee Approved

A plant that lives for one growing season, starting from a seed each year.

anticyclone FWS Fire Weather Subcommittee Approved

According to the American Meteorological Society, an atmospheric anticyclonic circulation, a closed circulation. The wind in an anticyclone is in the clockwise direction in the Northern Hemisphere.

antiemetic EMC Emergency Medical Committee Approved

An agent that reduces or prevents vomiting.

apparatus ETC Equipment Technology Committee Approved

A motor-driven vehicle, or group of vehicles, designed and constructed for the purpose of fighting fires. May be of different types such as engines, water tenders, ladder trucks, etc.

apparatus identifier ETC Equipment Technology Committee Approved

The alphanumeric characters assigned to an apparatus.

apparatus number NCSC National Coordination System Committee Archived

The external alphanumeric value painted on the side of the equipment.

approved IOSC Incident Operations Subcommittee Archived

In fire service terminology, that which is inspected and listed by recognized fire-testing agencies. The term as used in National Fire Protection Association standards means approval by the authority having jurisdiction, such as the fire chief, insurance inspection department, or other agency that enforces standards or regulations. 

Aramid RMC Risk Management Committee Approved

The generic name for a high-strength, flame-resistant, synthetic fabric used in the shirts and jeans of firefighters. Nomex ® , a brand name for aramid fabric, is the term commonly used by firefighters.

arcing/clashing CEPC Communication, Education, and Prevention Committee In Development

Electric arc: continuous, high-density electric current between two searated conductors in a gas or vapour with a relatively low potential difference, or voltage, across the conductors. Conductor clashing occurs when energized wires accidentally come into contact with each other.

arduous duty level RMC Risk Management Committee Archived

Arduous duty field work requires above-average endurance and superior conditioning.  Duties may include an occasional demand for extraordinarily strenuous activity in emergency situations under adverse environmental conditions over extended periods. The pace of work typically is set by the emergency condition.  Essential functions include, but are not limited to: running, walking or hiking, climbing, jumping, twisting, bending, lifting more than 50 pounds, and carrying 45 pounds or more for extended periods over difficult terrain. 

area command NIMSIC National Incident Management System Integration Committee Approved

An organization that oversees the management of multiple incidents or oversees the management of a very large or evolving situation with multiple ICS organizations.

area coordination center NCSC National Coordination System Committee, IBC Incident Business Committee Approved

A facility which serves as a central point for one or more agencies to use in processing information and resource requests. It may also serve as a dispatch center for one of the agencies.

area ignition FUSC Fire Use Subcommittee Approved

Ignition of several individual fires throughout an area, either simultaneously or in rapid succession, and so spaced that they add to and influence the main body of the fire to produce a hot, fast-spreading fire condition.

area of influence IOSC Incident Operations Subcommittee Approved

Delineated area surrounding a base which can be reached first by the ground or air attack units assigned to the base.

area source FUSC Fire Use Subcommittee Approved

A source category of air pollution that generally extends over a large area. Prescribed burning, field burning, home heating, and open burning are examples of area sources.

armed SEATB Single Engine Airtanker Board, IAB Interagency Airtanker Board Approved

A term used to indicate that the airtanker dropping mechanism is set to allow a programmed release of part or all of the load of fire retardant.

arrest WFISC Wildland Fire Investigation Subcommittee Approved

The taking or keeping of a person in custody by legal authority, especially in response to a criminal charge.

arson WFISC Wildland Fire Investigation Subcommittee Approved

At common law, the malicious and willful burning of another's dwelling, outhouse or parcel; by most modern statutes, the intentional and wrongful burning of someone else's, or one's own, property. Frequently requires proof of malicious or wrongful intent.

arson CEPC Communication, Education, and Prevention Committee In Development

At common law, the malicious and willful burning of another's dwelling, outhouse, or parcel; by most modern statutes, the intentional or wrongful burin gof someone else's, orone's own property. Frequently requires proof of malicious or wrongful intent.

arson fire WFISC Wildland Fire Investigation Subcommittee Approved

A fire that is intentional and wrongfully set to burn one's own or someone else's property.

arson task force WFISC Wildland Fire Investigation Subcommittee Approved

Group of individuals convened to analyze, investigate and solve arson problems in a particular region.

arsonist WFISC Wildland Fire Investigation Subcommittee Approved

One who commits arson.

arteriosclerotic EMC Emergency Medical Committee Approved

A chronic disease characterized by abnormal thickening and hardening of the arterial walls with resulting loss of elasticity.

aspect FDSC Fire Danger Subcommittee Approved

Cardinal direction toward which a slope faces.

aspect code (Point of Origin) (POO) Approved

A code used to describe the direction toward which the predominant slope faces at the point of origin of the fire (including ridgetops and/or flat ground). Point of origin is the location where a competent ignition source came into contact with the material first ignited and sustained combustion occurred.

aspirate [foam] ETC Equipment Technology Committee Approved

To draw in gases (or other substances); nozzle aspirating systems draw air into the nozzle to mix with the foam solution.

assessment [decision-making] IBC Incident Business Committee Approved

The evaluation and interpretation of measurements, intelligence, and other information to provide a basis for decision-making.

assessment [fire weather] FWS Fire Weather Subcommittee Approved

A fire weather fire danger product based on a thorough evaluation of all pertinent sources of meteorological, fire danger and resource information.

assigned resources NIMSIC National Incident Management System Integration Committee Approved

Resources checked in and assigned work tasks on an incident.

assignments NIMSIC National Incident Management System Integration Committee Approved

A task given to a person or team to perform based on operational objectives defined in the IAP.

assistant NIMSIC National Incident Management System Integration Committee Approved

A title for subordinates of principal Command Staff and EOC director’s staff positions. The title indicates a level of technical capability, qualification, and responsibility subordinate to the primary positions. Assistants may also be assigned to unit leaders.

assisting agency IBC Incident Business Committee, NIMSIC National Incident Management System Integration Committee Approved

An agency or organization providing personnel, services, or other resources to the agency with direct responsibility for incident management.

assumption WFISC Wildland Fire Investigation Subcommittee Approved

Acceptance of information as true without proof or demonstration.

asynchronous (training) TDC Training Delivery Committee Approved

Training where the students and/or instructors are not interacting with each other in real time. Typically, the students are accessing learning resources at a time of their choosing.

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NWCG Latest Announcements

2025 NWCG Incident Response Pocket Guide (IRPG), PMS 461, Now Available

Date: February 27, 2025
Contact: Incident Operations Subcommittee

NWCG is excited to announce that the 2025 NWCG Incident Response Pocket Guide (IRPG), PMS 461, is now available. Visit NWCG's website to learn about the major updates and changes in the 2025 version of the IRPG. The NWCG Guia de Respuesta de Incidente de Bolsillo (GRI), PMS 461-ES is available electronically and will be available from Great Basin Cache by early summer 2025.

All hard copy materials, including the IRPG, are ordered through the Great Basin Cache (GBK). Information on the ordering process can be found in the National Fire Equipment System (NFES) Catalog.

References:

2025 IRPG Information 

NWCG Incident Response Pocket Guide (IRPG), PMS 461 

NWCG Guia de Respuesta de Incidente de Bolsillo (GRI), PMS 461-ES 

NWCG NFES Catalog - Part 2: Publications, PMS 449-2 

2025 Professional Reading Program

Date: February 18, 2025
Contact: Wildland Fire Leadership Development Program (WFLDP)

The Wildland Fire Leadership Development Program is announcing the 2025 Professional Reading list! The goal of the annual reading list is to promote the reading and discussion of the books throughout the year.

The five books chosen for this year are: Surf When You Can by Brett Crozier, Man’s Search for Meaning by Viktor E. Frankl, Elephant Company by Vicki Constantine Croke, Simply Managing by Henry Mintzberg, and Chop Wood Carry Water by Joshua Metcalf.

References:

Professional Reading Program

Task Group Volunteers Needed to Update the Property Loss or Damage Report, OF 289

Date: February 5, 2025
Contact: Julie Bennett, Incident Business Committee Chair

The Incident Business Committee (IBC) is requesting volunteers for a new task group to revise the 1981 version of the Property Loss or Damage Report, OF 289 and create an incident replacement job aid. The volunteers may be recruited from within or outside the Geographic Area Incident Business Committees.

References:

IBC Memorandum 25-02

IBC Correspondence

2025 Updates to the NWCG Standards for Wildland Fire Position Qualifications, PMS 310-1

Date: February 4, 2025
Contact: Incident and Position Standards Committee

The NWCG Incident and Position Standards Committee has updated the NWCG Standards for Wildland Fire Position Qualifications, PMS 310-1. 

These updates address changes to incident position names and requirements for qualification, training, and experience. Updates related to the implementation of Complex Incident Management (CIM) are also included.  

The NWCG Wildland Fire Position Qualification Flowchart, PMS 308 has also been updated to reflect the recent changes.

References:

NWCG Standards for Wildland Fire Position Qualifications, PMS 310-1

NWCG Wildland Fire Position Qualification Flowchart, PMS 308

NWCG Memo: 2025-01 January 2025 Updates to the NWCG Standards for Wildland Fire Positions Qualifications, PMS 310-1