of all portions of the ship's structure, equipment,
CHEMICAL, BIOLOGICAL, AND RADIOLOGI-
cargo, and personnel. The force of gravity may be
CAL (CBR) BOUNDARY--A physical barrier
considered as a single force, which acts downward
that isolates an area not protected against CBR
through the ship's center of gravity (G).
contamination from an area that is protected against
CBR contamination.
CENTER OF GRAVITY--The point at which all the
weights of the unit or system are considered to be
CHEMICAL, BIOLOGICAL, AND RADIOLOGI-
concentrated and have the same effect as that of all
CAL (CBR) DEFENSE BILL-- The CBR
the component parts.
D e f e n s e B i l l c o n s t i t u t e s t h e h u l l - s p e c i fi c
CENTIGRAY (cGy)--An international unit of measure
application of doctrinal concepts and technical
for absorbed radiological dose, used by other U.S.
procedures.
military services and allies; equivalent to a rad. One
CHOKING AGENTS--Choking agents, sometimes
roentgen of exposure to gamma radiation results in
called lung irritants, primarily injure the respiratory
an absorbed dose of approximately one cGy.
tract which includes the nose, the throat, and
CENTRIFUGAL DRY SPARK ARRESTER--A
particularly the lungs where it causes pulmonary
device used to remove particulate suspended in
edema. In extreme cases, membranes swell, lungs
incinerator smoke. It works by drawing the smoke
become filled with liquid, and death results from
through a cyclone chamber where the heavier
lack of oxygen; thus, these agents choke an
particulates are thrown to the sides of the chamber by
unprotected man. Fatalities of this type are known
centrifugal force and then are collected and removed.
as "dry-land drownings."
CHALK TEST--A simple means of determining if the
CIRCLE WILLIAM--The material classification of
gasket is in continuous contact with the knife-edge
openings and ventilation systems between the
when a closure is dogged.
interior of the ship and the outside atmosphere that
CHARLIE (C) FIRES--Fires that occur in electrical
are secured to minimize the penetration of nuclear
wiring or equipment.
fallout, chemical agents, or biological agents.
C H E M I C A L AG E N T P O I N T D E T E C T O R
CIRCLE XRAY--Fittings marked with a black X
SYSTEM (CAPDS)--The CAPDS is a local
inside of a black circle. These modified closures are
sampling detection device. It is used to detect the
secured during conditions XRAY, YOKE, and
presence of chemical agents in the air.
ZEBRA.
C H E M I C A L AG E N T S -- A g e n t s t h a t p r o d u c e
CIRCLE YOKE--Fittings are marked with a black Y
harmful physiological reactions when applied to the
inside of a black circle. These modified fittings are
body externally, inhaled, or swallowed. Most
secured during conditions YOKE and ZEBRA.
military chemical agents cause disorganization of
the functioning of the body.
CIRCLE ZEBRA--Fittings are marked with a red Z
CHEMICAL AND BIOLOGICAL (CB)
inside a red circle. These modified fittings are
WA R FA R E -- To d e n y e n t r y o r n e u t r a l i z e
secured during condition ZEBRA. CIRCLE
contamination so the mission of the ship can be
Z E B R A fi t t i n g s m a y b e o p e n e d w i t h t h e
carried out without endangering the life or health of
commanding officer's permission during prolonged
assigned personnel.
periods of general quarters.
CHEMICAL PROTECTIVE ENSEMBLE (CPE)--
C L O S E D C O M PA R T M E N T O P E N I N G
The combination of all individual chemical
REQUEST--A form submitted to the GFE via the
protective equipment including suit, boots, gloves,
chain of command requesting gas free engineering
and mask.
services in support of opening a closed space. This
CHEMICAL PROTECTIVE OVERGARMENT--
request only allows opening. Entry is authorized
The chemical protective overgarment (CPO) is
using the gas free certificate. This form may also be
made of material that is permeable to water vapor;
used to request other gas free engineering services,
that is, it allows the escape of moisture from
such as ventilation or planning for cold work.
perspiration. The function of the CPO is to protect
CLOSURE SYSTEM--Protects the interior of the
the wearer from threat levels of chemical agents in
liquid form and from the associated vapor.
ship against the entry of aerosols and gases.
AI-5
