What type of fire suppression foam is commonly used in airport firefighting?

Aqueous Film Forming Foam (AFFF) is the most commonly used type of fire suppression foam in airport firefighting due to its effectiveness in combating flammable liquid fires, which are prevalent in aviation incidents. AFFF works by creating a thin, aqueous film that spreads across the burning surface of the fuel, effectively smothering the flames and preventing the release of flammable vapors. This film also helps to cool the underlying fuel, reducing the risk of re-ignition.

The unique formulation of AFFF allows it to quickly blanket the fuel surface, providing rapid fire control. In an airport environment, where fuels such as aviation gasoline and jet fuel can ignite and spread quickly, the use of AFFF is crucial for minimizing damage and ensuring the safety of personnel and passengers.

While other options may have their purposes in fire suppression, they do not match the specific advantages of AFFF in situations typical in aviation incidents. For instance, protein foam offers similar properties but is generally less effective against the types of fuels found in aviation. Carbon Dioxide foam is effective in certain scenarios but is typically used for electrical fires rather than flammable liquids. Dry Chemical Powder, while effective for various types of fires, is not as efficient as AFFF in forming