These requirements cover Class 1 (magnetic) and Class 2 (nonmagnetic) cartridge-operated potassium bicarbonate type Size 1 [nominal 18 pound (8.2 kg)] and Size 2 [nominal 27 pound (12.2 kg)] portable fire extinguishers intended for U.S. Navy Shipboard Applications within the Naval Sea Systems Command and within all other Departments and Agencies of the Department of Defense. These extinguishers consist of a shell@ fill cap@ external carbon-dioxide cartridge@ external cartridge receiver@ cartridge guard@ gas tube@ hose@ shut-off nozzle@ carrying handle@ mounting bracket and nozzle holder. The requirements for performance during fire testing of dry chemical fire extinguishers as noted in 1.1 are specified in the Standard for Rating and Fire Testing of Fire Extinguishers@ UL 711. A product that contains features@ characteristics@ components@ materials@ or systems new or different from those covered by the requirements in this Outline of Investigation@ and that involve a risk of fire@ electric shock@ or injury to persons shall be evaluated using the appropriate additional component and end-product requirements as required to maintain the level of safety as originally anticipated by the intent of this Outline of Investigation. A product whose features@ characteristics@ components@ materials@ or systems conflict with specific requirements or provisions of this Outline of Investigation is not judged to comply with this Outline of Investigation. Where appropriate@ revision of requirements are proposed and adopted in conformance with the methods employed for development@ revision@ and implementation of this Outline of Investigation.