What does the combination of red and green denote?

The combination of red and green typically denotes Aqueous Film Forming Foam (AFFF). AFFF is a fire-fighting agent used primarily for suppressing flammable liquid fires, particularly those involving hydrocarbons such as jet fuel. The red color represents the foam, which is used to cover and smother flames, while the green hints at the type of formulation that's effective against these types of fires.

AFFF works by creating a barrier between the fuel and the oxygen in the air, helping to prevent re-ignition and control fires effectively. The color coding serves as a quick visual reference to ensure that crew members can identify and select the right type of firefighting agent in emergency situations. Understanding these color codes is crucial for safety and efficient firefighting operations.