In an Index C configuration, how many vehicles are needed and what do they carry?

In an Index C configuration, the requirement specifies that three vehicles are needed, which carry a combined total of 3,000 gallons of water and Aqueous Film Forming Foam (AFFF). This setup is critical for handling the unique demands of aircraft emergencies that an Index C configuration is designed to address, particularly in terms of fire suppression and the effective management of fire hazards associated with jet fuel or other aviation fuels.

The inclusion of both water and AFFF in the vehicles is essential as water alone is not as effective for suppressing fuel fires, which is where AFFF becomes valuable due to its ability to create a film over the fuel surface, preventing re-ignition and suffocating existing flames. Having three vehicles ensures that there is ample capacity and resources available to respond to significant fire incidents involving large aircraft and ensures compliance with the standards set forth for airport firefighting operations.

The other choices present configurations or quantities that do not align with the established needs for Index C situations, either indicating the use of incorrect agents or insufficient quantities. Understanding these requirements is vital for effective airport firefighting and emergency response planning.