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The most common apparatus in the Honolulu Fire Department (HFD) is the engine. There are 43 engines, one at each station except at the aircraft and waterfront stations. An engine carries a crew of five fire fighting personnel, who are collectively known as a company. An engine company consists of a Fire Captain, a Fire Fighter III, and three Fire Fighter Is. The main characteristic of the engine is the internal water pump that is driven by the apparatus motor through the apparatus transmission. The internal water pumps are rated to deliver 1,500-2,000 gallons per minute. In addition, the engines carry internal water tanks that have a capacity of 500-750 gallons.
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 Engine 11 (E11) with a supply line connected to a fire hydrant. The supply line feeds water from the hydrant to E11's water pump. |
 E36's water pump allows the apparatus operator to accurately distribute water to several different hoselines.
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An engine's primary responsibilities include responding to:
- fires
- emergency medical services
- hazmat incidents
- motor vehicle accidents
- natural disasters
- requests for assistance
- search and rescues
- service requests
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Engines are equipped with:
- an automated external defibrillator (AED)
- emergency medical supplies
- fire hoses and nozzles
- fire fighting foam
- ground ladders
- medical oxygen
- personal protective equipment
- portable radios
- self-contained breathing apparatuses
- various hand tools
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 Pump panel. The large yellow connection is the pump's water intake.
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