What extinguishing agent is commonly used for electrical fires aboard a vessel?

Halon is commonly used for electrical fires aboard a vessel due to its effectiveness in suppressing flames without conducting electricity. This is critical because water, while a typical extinguishing agent for many fires, is not suitable for electrical fires as it can create a shock hazard. Halon works by chemically interrupting the combustion process and can rapidly displace oxygen in the vicinity of the fire, making it effective in enclosed spaces often found on vessels.

Dry chemical agents can also be used for electrical fires, but Halon has properties that make it especially preferred on many vessels, particularly in areas with sensitive equipment. Foam is generally used for flammable liquid fires and is not appropriate for electrical fires, as it can also cause short circuits or other electrical hazards. Therefore, Halon is recognized as the suitable agent for safely extinguishing electrical fires in marine environments.