'fire engine crew' vs 'fire engine module'

https://www.ifpm.nifc.gov/standard/electronicver/7-Engine_Supervisors.pdf

USA wildland fire terminology

reading between the lines

fire engine crew = 4 people - leader is ICT5 - can command 6 people at
most on a small widland fire

fire engine MODULE- FIVE people - leader is ICT4 who can command 1 strike team

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• ICT5 is the command qualification for the lowest complexity
incident. Type 5 incidents typically require less than 6 fire fighters
to control, and single engine crews are typically assigned to these
types of incidents.

• S-211 is a prerequisite training course for ENGB in the PMS 310-1,
and provides the basic understanding of hydraulics and hose-lay
applications, critical knowledge to operate a wildland engine.

• The combination of ENGB, ICT5, and S-211 provides the incumbent with
the knowledge of fire behavior, suppression, resources, equipment,
tools, methods and techniques sufficient to safely, efficiently, and
effectively direct the suppression of wildfires.

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ICT4 maybe has CDL driving license for trucks over 26,000 lbs - maybe
required for manual transmission trucks - which might be rare now

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ENGB is the minimum qualification needed to supervise a wildland
engine crew on an incident. Without the ENGB qualification, the engine
does not meet national standards for engine staffing (Redbook).

• ICT4 is the command qualification for the second lowest complexity
incident. Type 4 incidents typically require up to a strike team or
task force configuration of resources to control, and the engine
supervisor needs to have this qualification as they are typically the
initial attack responder for Type 4 incidents.
• The combination of ENGB and ICT4 provides the incumbent with the
knowledge of fire behavior, suppression, resources, equipment, tools,
methods and techniques sufficient to safely, efficiently, and
effectively direct the suppression of wildfires.