[6] It was also widely used in the maritime industry to add a third level of protection should the main and emergency fire pumps become inoperable or ineffective.

Halon 1301 was never widely used in portables outside marine, military and spacecraft applications, due to its limited range, and invisible discharge.

Halon 1301 is widely used by the U.S. Military[7] and NASA in a 2-3/4 lb portable extinguisher with a sealed, disposable cylinder for quick recharging.

Halon 1301 is the primary agent used in commercial aviation engine, cargo compartments, and auxiliary power unit fire zones.

Hydrochlorofluorocarbons, i.e., HCFCs including HCFC containing NAF S-III, contain chlorine and are stratospheric ozone layer depleters, although less so than Halon 1301.