GLOSSARY

TM 55-1925-292-14&P

OPERATOR, UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE

FIREFIGHTING, FIRE ALARM, AND FIRE SUPPRESSION SYSTEMS FOR

INLAND AND COASTAL LARGE TUG (LT)

GLOSSARY

AFFF

Acronym for Aqueous Film Forming Foam. A synthetic foam

concentrate containing detergent and fluorocarbon surfactant

that forms a foam capable of producing a vapor-suppressing

aqueous film on the surface of some hydrocarbon fuels. It

provides rapid flame knockdown on short preburn, shallow spill

fires (e.g. aircraft crash fires), but is not suited for use on long

preburn, deep-seated fires (e.g. storage tank fires).

Annunciator

An alarm indicator (sound, light, bell, etc.) that signals the alarm

status of alarm devices in the security system.

Arm

Activating or enabling the alarm system. See Disarm.

Audible Alarm

A sound generating alarm device such as a siren, bell, or horn

used to indicate an alarm condition.

Bypass

Disabling or deactivating a zone of a security system.

Disarm

Deactivating or disabling the alarm system.

Electro-Mechanical Bell

A high decibel alarm signaling device that uses a spring driven

striking mechanism upon an outer bell (as compared to a siren

or electronic alarm signal).

Fire Alarm Pull Station

A device that permits crewmembers to manually actuate the

fire alarm system.

Fire Detection

A system containing either or both a smoke detector and heat

detector (see Smoke Detector, Heat Detector).

Fire Extinguisher

A hand held device containing an agent capable of extinguish-

ing small fires.

Fire Monitor

A device used to direct firefighting water to extinguish fires that

might not be accessible with portable hoses and nozzles.

Fixed-Temperature Heat Detectors

A fire detection device that triggers an alarm when the tem-

perature at the detector reaches a pre-set limit.

FM-200

Chemically known as heptafluoropropane, FM-200 is a clean

agent alternative to Halon 1301 which NFPA 2001 accepts for

use in total flooding situations where human exposure is ex-

pected. FM-200 contains no ozone depleting chlorine or bro-

mine.

Heat Detector

A fire detection device that detects the heat from a fire and

triggers an alarm and/or a water sprinkler system.

HF Gas

Acronym for hydrogen fluoride gas. This poisonous gas is

formed when FM-200 fire suppression agent contacts hot flame

or components.

Glossary-1