GLOSSARY - continued

TM 55-1925-292-14&P

Ionizing Smoke Detector

A fire detection device that uses a small amount of radioactive

material to detect smoke.

LED

Acronym for Light Emitting Diode. A small light found on a

security control panel (or device) that indicates status (on/off,

arm/disarm, alarm/normal, etc.).

Machinery Space

Main and auxiliary machinery spaces, which contain any of the

following: installed fire fighting systems, oil fired boilers, inter-

nal combustion engines, gas turbines, or steam turbines.

Nozzle

A device attached to the end of the fire hose which permits the

firefighter to vary the flow of water delivered from the hose.

Overhaul

An examination and cleanup operation. It includes finding and

extinguishing hidden fire and hot embers and determining

whether the fire has extended to other parts of the vessel.

Pull Box

A manually activated fire alarm switch.

Vapor Secure

Establishing a film or foam blanket over flammable liquid to

prevent vaporization. When vapors cannot reach the flames,

flame production ceases and the surface is vapor secured.

Water Washdown System

A sprinkler system installed in AMS-1 and the engine room to

cool these spaces in the event of a fire. Cooling the space

prevents formation of poisonous HF gas formed when FM-200

extinguishing agent contacts hot flame or components.

Zone

A protected area within a fire detection system. Can permit

partial arming/disarming.

END OF WORK PACKAGE

Glossary-2