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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.  

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Title Steward Status Definition
Demobilization Unit NIMSIC National Incident Management System Integration Committee Approved

Demobilization Unit staff develop an Incident Demobilization Plan that includes specific instructions for all personnel and other resources to be demobilized. They begin their work early in the incident, creating rosters of personnel and resources and obtaining any missing information as check-in proceeds. Once the Incident Commander or Unified Command has approved the Incident Demobilization Plan, Demobilization Unit staff ensure its distribution at the incident and elsewhere, as necessary. For major incidents, demobilization plans are dynamic and the staff in the Demobilization Unit may need to update them frequently.

denier MFES Mobile Fire Equipment Subcommittee Approved

A unit of weight; used to express the yarn number of polyester and other continuous filament fibers.

dense layer FWS Fire Weather Subcommittee Approved

A layer of clouds whose ratio of dense sky cover to total sky cover is more than one-half.

dense sky cover FWS Fire Weather Subcommittee Approved

Sky cover that prevents detection of higher clouds or the sky above it.

density (foam) ETC Equipment Technology Committee Approved

The ratio of the original volume of the nonaerated foam solution to the resultant volume of foam. The inverse of expansion.

density altitude MFES Mobile Fire Equipment Subcommittee Approved

Pressure altitude corrected for temperature.

dental caries EMC Emergency Medical Committee Approved

A progressive destruction of bone or tooth; especially: tooth decay.

Department

Above Agency in hierarchy.

Department Approval Date

Day/Month/Year officially accepted by the Department as meeting all Department requirements to receive funds in the planned year.

Departure from Average Greenness (DA) FDSC Fire Danger Subcommittee Approved

An NDVI-derived image of vegetation greenness compared to its average greenness for the current week of the year.

depression (topographic) IPSC Incident and Position Standards Committee Approved

A low place in the ground having no outlet for surface drainage.

Depth of Burn (DOB) FWS Fire Weather Subcommittee Approved

The reduction in forest floor thickness due to consumption by fire.

depth of char indicators WFISC Wildland Fire Investigation Subcommittee Approved

Sometimes referred to as "alligatoring", where combustible material appears to have a fissured or scaly appearance similar to an alligator's hide. Most commonly associated with finished lumber products, such as boards and fence posts.

Deputy NIMSIC National Incident Management System Integration Committee Approved

A fully qualified individual who, in the absence of a superior, can be delegated the authority to manage a functional operation or to perform a specific task. In some cases, a deputy can act as relief for a superior, and, therefore, should be fully qualified in the position. Deputies generally can be assigned to the Incident Commander, EOC director, General Staff, and branch directors.

derailment CEPC Communication, Education, and Prevention Committee In Development

A type of train wreck that occurs when a rail vehicle such as a train comes off its rails.

desiccant ETC Equipment Technology Committee Approved

Chemical that, when applied to a living plant, causes or accelerates drying of its aerial parts; used to facilitate burning of living vegetation by substantially lowering fuel moisture content within a few hours.

designated area FUSC Fire Use Subcommittee Approved

Those areas identified as principal population centers or other areas requiring protection under state or federal air quality laws or regulations.

Designated Dispatch Point (DDP) IBC Incident Business Committee Approved

The address where the unit must be physically located, and dispatched from, during the mandatory availability period.

detection method IOSC Incident Operations Subcommittee, FRSC Fire Reporting Subcommittee Approved

The means by which the fire was initially observed.

detonation WFISC Wildland Fire Investigation Subcommittee Approved

An extreme rapid decomposition of a material in which the reaction is more than a sonic velocity, for example, high explosives.

device CEPC Communication, Education, and Prevention Committee In Development
dew point FWS Fire Weather Subcommittee Approved

Temperature to which a specified parcel of air must cool, at constant pressure and water-vapor content, in order for saturation to occur. The dew point is always lower than the wet-bulb temperature, which is always lower than the dry-bulb temperature, except when the air is saturated and all three values are equal. Fog may form when temperature drops to equal the dew point. 

diagram WFISC Wildland Fire Investigation Subcommittee Approved

A scale drawing showing information about a fire scene.

die-out pattern indicators WFISC Wildland Fire Investigation Subcommittee Approved

Fingers or islands of less intensely burned areas or areas where the fire has self extinguished.

digital elevation model FWS Fire Weather Subcommittee Approved

A set of points which defines the terrain as numbers for computer applications. This data may be used to draw contours, make ortho photos, slope maps, and drive fire models.

dilution FUSC Fire Use Subcommittee Approved

A control strategy used in managing smoke from prescribed fires in which smoke concentration is reduced by diluting it through a greater volume of air, either by scheduling during good dispersion conditions or burning at a slower rate.

dipsite (helicopter) NIAC National Interagency Aviation Committee Approved

A natural or manmade water site that a helicopter can fill their bucket with water, such as a stream, river, lake, swimming pool, etc...

direct attack IOSC Incident Operations Subcommittee Approved

Any treatment applied directly to burning fuel such as wetting, smothering, or chemically quenching the fire or by physically separating the burning from unburned fuel.

direct line IOSC Incident Operations Subcommittee Approved

Any treatment applied directly to burning fuel such as wetting, smothering, or chemically quenching the fire or by physically separating the burning from unburned fuel.

direct protection area IOSC Incident Operations Subcommittee Approved

That area for which a particular fire protection organization has the primary responsibility for attacking an uncontrolled fire and for directing the suppression action. Such responsibility may develop through law, contract, or personal interest of the firefighting agent (e.g., a lumber operator). Several agencies or entities may have some basic responsibilities (e.g., private owner) without being known as the fire organization having direct protection responsibility. 

directional vectors WFISC Wildland Fire Investigation Subcommittee Approved

The physical characteristics of the indicators that show the direction of fire spread, i.e., advancing, backing, or lateral.

directions (driving) Approved

Driving directions to water source for trucks.

Director NIMSIC National Incident Management System Integration Committee Approved

The ICS title for individuals responsible for supervision of a branch. Also, an organizational title for an individual responsible for managing and directing the team in an EOC.

discarded smoking material CEPC Communication, Education, and Prevention Committee In Development

Materials such as cigarette butts, cigars, and matches.

discovery WFISC Wildland Fire Investigation Subcommittee Approved

Determination that a fire exists. Location and reporting of a fire is not required as is with detection.

discovery time IOSC Incident Operations Subcommittee Approved

Elapsed time from start of fire (known or estimated) until the time of the first discovery that results directly in fire suppression action.

discrete frequency NCSC National Coordination System Committee Approved

A separate radio frequency most commonly used in air traffic control which reduces frequency congestion by controlling the number of aircraft or other resources operating on a particular frequency.

dispatch IBC Incident Business Committee, NIMSIC National Incident Management System Integration Committee, NCSC National Coordination System Committee Approved

The ordered movement of a resource or resources to an assigned operational mission, or an administrative move from one location to another.

dispatch center IBC Incident Business Committee, NCSC National Coordination System Committee Approved

An organization from which resources are ordered, mobilized or assigned to an incident and/or demobilized. The center may process requests, coordinate response, or track resources and information under the delegation of its benefiting agency(s).

dispatch center (current) NCSC National Coordination System Committee Approved

The dispatch center actively supporting an incident and the resources assigned or a resource who is temporarily transferred for official action i.e. details, temporary duty station, etc.

dispatch center (home) NCSC National Coordination System Committee Approved

The dispatch center associated with a resource’s home unit. The Home Dispatch Center is responsible for initial mobilization and is the Center associated with the resource when an assignment is completed.

dispatch center (ordering) IBC Incident Business Committee, NCSC National Coordination System Committee Approved

The current dispatch center for an incident.

dispatch center (sending) IBC Incident Business Committee, NCSC National Coordination System Committee Approved

Either the home or current dispatch center for a resource.

dispatch center area NCSC National Coordination System Committee Approved

Name of the Dispatch Area or Zone

dispatch center location NCSC National Coordination System Committee Approved

The city and state of the dispatch center

dispatch center name NCSC National Coordination System Committee Approved

Name of the dispatch center

dispatch center unit identifier NCSC National Coordination System Committee Approved

Unit Identifier for the dispatch center

dispatch tier NCSC National Coordination System Committee Approved

Levels of the wildland fire dispatch and coordination system

dispatch/coordination center (geographic) UIB Unit Identifier Board Approved

An organizational unit responsible for managing the effective coordination, mobilization, and demobilization of emergency management resources for their respective organizational unit e.g., GACC.

dispatch/coordination center (local) UIB Unit Identifier Board Approved

An organizational unit responsible for initial attack dispatching, coordination of communications, intelligence gathering and dissemination, and logistical support for local incidents and field operations for their respective organizational unit e.g., local dispatch or Command Center.

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NWCG Latest Announcements

Updated Emergency Equipment Shift Ticket, OF 297

Date: June 4, 2024
Contact: NWCG Incident Business Committee 

The 1990 version of the Emergency Equipment Shift Ticket, OF 297, has been replaced by the updated May 2024 version. The new version of the OF 297 has been modified and improved to meet current incident management needs. The form now has areas to document the staffing of equipment and special rates. IBC has created a one-page help document and 3 completed sample OF-297 forms to assist in this transition, available on the IBC webpage.

References:

Incident Business Committee

Emergency Equipment Shift Ticket, OF 297

2023 Wildland Fire EMS Awards

Date: May 24, 2024
Contact: NWCG Emergency Medical Committee 

The NWCG Emergency Medical Committee (EMC) announces the recipients of the 2023 Wildland Fire EMS Awards. EMC annually recognizes individuals and groups who have demonstrated outstanding actions or accomplishments that are above and beyond the expectation of one’s normal mission or job duties.

Congratulations to all the awardees and nominees. Through leadership and initiative, they have made significant contributions to the safety of the wildland fire community. These awards are well deserved.

References:

2023 Wildland Fire EMS Awards

NWCG Emergency Medical Committee

Next Generation Position Task Books

Date: May 21, 2024
Contact: NWCG Training 

NWCG is excited to announce the release of Next Generation Position Task Books (Next Gen PTBs). The Next Gen PTB is part of the Incident Performance and Training Modernization (IPTM) effort. Next Gen PTBs are intended to be used in conjunction with Incident Position Standards to support constructive conversations between trainees and evaluators, set baseline standards, and enhance speed to competency.

Next Gen PTBs and Incident Position Standards are now available for Crew Boss, Single Resource (CRWB) and Prescribed Fire Burn Boss Type 2 (RXB2). As positions go through IPTM, Next Gen PTBs will be developed and published.

References:

NWCG Position Task Books

Incident Performance and Training Modernization (IPTM)

Updated NWCG Standards for Fire Unmanned Aircraft Systems Operations, PMS 515

Date: May 10, 2024
Contact: IFUASS Qualification and Curriculum Board (IFUASS) 

The 2024 revision of the NWCG Standards for Fire Unmanned Aircraft Systems Operations, PMS 515 is now available. PMS 515 standardizes the processes and procedures for interagency use of Unmanned Aircraft Systems (UAS), including pilot inspections and approvals. This publication is now available as a PDF for easy use offline.

References:

NWCG Standards for Fire Unmanned Aircraft Systems Operations, PMS 515