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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Course Materials

These materials are for instructor-led delivery. 

Unit/Topic Presentations Materials
G-231 Unit 1:  S-290 Intermediate Wildland Fire Behavior

At the completion of this course structural fire officers will:

  1. Identify and describe the characteristics of fuels, weather, and topography that influence wildland fire behavior.
  2. Describe the interaction of fuels, weather, and topography on wildland fire behavior, fireline tactics, and safety.
  3. Describe the causes of extreme fire behavior conditions (long range spotting, crowning, and fire whirls) that develop due to weather, fuels, and/or topography.
  4. Interpret, communicate, apply, and document wildland fire behavior and weather information.


Note: Use the S-290 Introduction to introduce this course. In addition to presenting the information in the Course Introduction, instructors should explain where the G-231 course fits in the Gap course curriculum and the NWCG credentialing system.

S-290 Unit 1-12, Nov 2007 version (32 hrs)


S-290 Unit 1-11, Self-Directed (Online) Nov 2007 (15 hrs)

Reference S-290, Intermediate Wildland Fire Behavior, 2007 for additional course delivery information.

G-231 Unit 2:  Mobilization
  1. Identify the readiness and special equipment items that are required for the Crew Boss.
  2. List eight pieces of information to request from dispatch prior to departure.
  3. Identify five key elements of information needed to complete a Passenger/Cargo manifest.
  4. Explain the importance of evaluating crew readiness and establishing crew organization.
  5. Provide examples of appropriate travel procedures and conduct.

S-230 Unit 2, Nov 2004 version, (1 hr)

G-231 Unit 3:  Fireline Operations:  Entrapment Avoidance
  • Demonstrate the ability to apply the principles of Lookouts, Communications, Escape Routes, and Safety Zones (LCES).

S-131 Unit 3, Oct 2016 (Updated in 2020), (4 hr)​

G-231 Unit 4:  Fireline Operations:  Safety and Tactics
  1. Demonstrate the proper use of LCES in the fire environment in relation to the Crew Boss role.
  2. Organize, plan, and describe the actions that are required when a crew is deployed for fireline suppression activities.
  3. Given an Incident Response Pocket Guide, safely complete a simulated fireline assignment.
  4. Describe safety precautions that should be addressed by the Crew Boss in downhill and indirect fireline construction.
  5. Describe applicable methods to employ in fireline construction that will facilitate rehabilitation.
  6. List the items to check when inspecting a completed fireline.
  7. List crew procedures used in staging areas.
  8. Describe Crew Boss responsibilities for accidents, injuries, and near misses.
  9. Identify supply needs and explain the process for re-supplying a crew while on the fireline.
  10. Complete an After Action Review (AAR).

S-230 Unit 4C, Nov 2004 version, (4 hrs)

G-231 Unit 5:  Demob
  1. Describe procedures for re-supply of fire-expended items.
  2. List the steps necessary for the demobilization of a crew from an incident.
  3. List the key responsibilities of a Crew Boss prior to disassembly of crew at the initial mobilization point.

S-230 Unit 6, Nov 2004 version, (1 hr)​

G-231 Final Exam


S-230 Final Exam, Nov 2004 version

S-290 Final Exam, Nov 2007 version

Course Coordinators, Lead Instructors, or Unit Training Officers may email for access to the final exam and answer key. The request must come from an official NWCG partner email address.


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