National Wildfire Coordinating Group

G-231, Wildland Training (ENGB) for Structural Firefighters

G-231 Decorative banner. Four photos of wildland fire engine operations. Three firefighters word at the back of a water and hose truck with timber burning in background. A engine crew boss pulls a hose as he walks away from a fire engine. A firefighter walks on gravel road beside a fire engine as flames burn in brush behind him. A fire engine  drives down a dusty road in forest.

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This course is designed to provide wildland firefighting skills Engine Boss, Single Resource, to structural firefighter drivers, operators, engineers, or company officers who meet NFPA 1021 for Fire Officer 1 or equivalency. It is not available as a pre-packaged course. Instructors are required to assemble the Materials Required for Course Presentation below and teach according to the Course Outline. In order to receive credit for passing the course, students are required to pass the final exams contained in the S-230 course materials and the S-290.


At the completion of this course, structural fire officers will:

  • Identify and describe the characteristics of fuels, weather, and topography that influence wildland fire behavior.
  • Describe the interaction of fuels, weather, and topography on wildland fire behavior, fireline tactics, and safety.
  • Describe the causes of extreme fire behavior conditions (long range spotting, crowning, and fire whirls) that develop due to weather, fuels, and/or topography.
  • Interpret, communicate, apply, and document wildland fire behavior and weather information.
  • Describe crew boss responsibilities prior to and during mobilization, on the incident, and during demobilization.
  • Demonstrate the ability to apply the components of Lookouts, Communications, Escape Routes, and Safety Zones (LCES) as described in the NWCG Incident Response Pocket Guide (IRPG), PMS 461.
  • Identify the hazards and risks on various incidents and describe how to mitigate them.
  • Describe tactics which are appropriate to various wildland fire situations and procedures and implement them through the chain of command.

Target Group

Structural firefighter drivers, operators, engineers or company officers who meet NFPA 1021 for Fire Officer 1, desiring to be qualified as Engine Boss, Single Resource (ENGB).

Prerequisite Qualifications and Training

Structural firefighter drivers, operators, engineers or company officers who meet NFPA 1021 for Fire Officer 1, are qualified as wildland Firefighter Type 1 (FFT1), and who have taken G-131.


G-231 is available as classroom instructor-led training.

Course Components and Hours to Complete

Course Component Course Time
Pre-course work N/A
Pre-selection assessment N/A
Online training N/A
Instructor-led training 45
Total Hours 45

Course Level


Minimum Instructor Qualifications

Lead and unit instructors must be a qualified Strike Team Leader Engine (STEN) or Task Force Leader (TFLD).

Unit instructors must be qualified as Engine Boss, Single Resource (ENGB).

See NWCG Standards for Course Delivery, PMS 901-1, Instructor Standards for more information.


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