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NWCG Glossary of Wildland Fire (PMS 205)

Term Steward Status Definition
Initial Attack Incident Commander (IAIC) IOSC Incident Operations Subcommittee Archived The incident commander at the time the first attack forces commence suppression work on a fire.
initial fire strategy IRSC Incident Reporting Subcommittee Approved The fire strategy initially used on a wildland fire.
initial fire strategy designator IRSC Incident Reporting Subcommittee Approved The fire strategy initially used on a wildland fire. The initial fire strategy is the general plan or direction utilized until it succeeds or changes.
initial fire strategy met indicator IRSC Incident Reporting Subcommittee Approved Indicates whether the objectives for the initial fire strategy were attained.
initial investigative area FISC Fire Investigation Subcommittee Approved The area where investigator(s) begin their on-scene search for the general origin area.
initial response FMB Fire Management Board Approved The initial decisions and actions taken in reaction to a reported incident.
initial response date time IRSC Incident Reporting Subcommittee Approved The date/time the initial decisions and actions were taken in reaction to a reported incident.
initial response resource quantity IRSC Incident Reporting Subcommittee Approved The total number of fire resources by kind, category, and type (if listed and applicable) used during the initial response. Initial response resources will only be counted during initial attack. Extended Attack Incidents are those which persist beyond the first full operational period where local resources are not sufficient and the complexity elevates beyond initial attack commander capability.
initial response size PMC Fire Planning Management Committee, QMC Qualifications Management Committee, QSSC Qualifications Systems Subcommittee, LMC Logistic and Equipment Management Committee Grandfathered An estimate of acres burning at the time of initial response, more specifically when the Incident Commander arrives and performs initial size up.
inmate crew IOSC Incident Operations Subcommittee Approved Any fire crew composed of prison inmates or wards.
Inside Diameter (ID) ETSC Equipment/Technology Subcommittee Approved The internal diameter of a tube, conductor, or coupling, as distinguished from its OD (Outside Diameter). Fire hose sizes are classified by a nominal internal diameter.
Instructor-Led training (ILT) QMC Qualifications Management Committee, TDSC Training Delivery Subcommittee Approved Training that is delivered by an instructor in a classroom or field setting. Classroom instructor-led training may be delivered in person in a physical classroom or virtually using a video- or audio-conferencing platform.
Instrument Flight Rules (IFR) Conditions AMC Aviation Management Committee Approved Weather conditions below the minimum for flight under Visual Flight Rules and therefore requiring the observance of instruments inside the aircraft for controlling flight; generally considered to be less than 1000' AGL and 3 miles distant.
Instrument Landing System (ILS) AMC Aviation Management Committee Approved System for airplane landing in which the pilot is guided by radio beams.
instrument shelter FDSC Fire Danger Subcommittee Approved Naturally or artificially ventilated structure, constructed to specifications and used to shield weather measuring instruments from direct sunshine and precipitation.
Integrated Reporting of Wildland Fire Information Identifier IMC Integration Management Committee Approved Primary key for linking to the Wildland Fire Locations Point dataset.
Interactive Multimedia Instruction (IMI) PMC Fire Planning Management Committee, QMC Qualifications Management Committee, QSSC Qualifications Systems Subcommittee, LMC Logistic and Equipment Management Committee Archived A group of predominantly interactive, electronically delivered training. IMI products include instructional software and software management tools used in support of instructional programs. IMI products are teaching and management tools and may be used in combination or individually. Used individually, not all IMI products can be considered interactive, multimedia, or instructional. However, IMI products, when used in combination with one another, are interactive, multimedia, and instructional. IMI technology is one of the primary technologies to be used in distance learning. 
Interagency Authoritative Data Source (IADS) IMC Integration Management Committee, DISC Data Integration Subcommittee Approved A product, tool, or IT application that has been designated as the trusted source for wildland fire data. This source may also create and update transactional data for use in other applications. There may be more than one IADS and it can change depending on business process complexity and life cycle. An IADS may be a compilation or subset of data from other authoritative sources. The DLM process ensures sources, limitations, currency, and attributes for the IADS are documented.
Interagency Resources Representative (IARR) IOSC Incident Operations Subcommittee Archived An individual who may be assigned to or requested by an incident to serve as the sending unit's representative to oversee the care and treatment of crews, overhead, and equipment assigned to an incident.
Interagency System of Record (ISOR) IMC Integration Management Committee, DISC Data Integration Subcommittee Approved Agencies and bureaus may have their own SOR for their data. An ISORs are identified by an interagency business area as the official application source of interagency data. An ISOR is the source that resolves duplicate records that may arise from various IADSs and ensures the data meets defined quality standards before it is included in official historical data sets. An ISOR can be an external source of data used by wildland fire.
interchangeable course PMC Fire Planning Management Committee, QMC Qualifications Management Committee, QSSC Qualifications Systems Subcommittee, LMC Logistic and Equipment Management Committee Archived A course developed by an interagency, all-hazard subject matter expert group containing the same learning objectives and content as an NWCG developed course. Interchangeable course do not require equivalency determination by a using agency and may have multiple course codes and/or numbers. These courses will be incorporated into IQCS/IQS and credit will be given for the NWCG course. 
intermittent IOSC Incident Operations Subcommittee Approved An appointment/agreement that meets the following conditions: Employing office is a government or contractor entity; there is no set work schedule; the person is in a call-when-needed status; employee receives compensation for work.
intermittent smoke FASC Fire Analysis Subcommittee Approved Smoke which becomes visible only at intervals.
internal load AMC Aviation Management Committee Approved Load carried inside the fuselage structure of an aircraft.
internal payload AMC Aviation Management Committee Approved Allowable aircraft cabin load, in pounds, with full fuel and pilot in calm air at standard atmosphere.
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