jeopardize the safety of personnel or endanger
equipment. Under no circumstances should equip-
ment be operated when tagged with DANGER
labels (fig. 2-10) are used to identify instruments
properly, This label indicates the instrument may
Figure 2-11.--Out-of-commission label (colored red).
be used for system operation only with extreme
HEAT STRESS.--While working in hot
Out-Of-Commission Labels.--RED labels
environments or during strenuous physical work
(fig. 2-11) are used to identify instruments that
in cool as well as hot ambient conditions,
do not work properly because they are defective
personnel are apt to suffer heat disorders. The
or isolated from the system. This indicates the
results are loss of time from duty and possible
instrument cannot be relied on and must be
death. Many of these illnesses result in prolonged
repaired and recalibrated, or be reconnected to
or permanent impairment of the affected person's
the system before use.
ability to withstand heat. Unacclimatized and
overweight personnel are particularly susceptible
ENFORCEMENT. --The tag-out log is kept
Because of these hazards, exposure of
in a designated space, usually CCS. Supervisory
personnel to extended periods of strenuous
watch standers review the log during watch relief.
physical work in spaces of high ambient
Active tag-outs are spot checked periodically to
temperature must conform with NAVMED
ensure tag integrity is being maintained.
An audit of the tag-out log is conducted by
the EDO every 2 weeks while in port, prior to
getting under way, and weekly if in the yards or
emission is an important aspect of pollution
at a maintenance availability. Results of the audit
control. Noise above certain sound levels can
are reported to the engineer officer.
cause a wide variety of unwanted effects on
To ensure that tag-out procedures are enforced
personnel, ranging from discomfort and anxiety
properly, the engineer officer checks the log
to illness and deafness. Because of these hazards,
frequently. If he notes any errors, he brings them
exposure of personnel to high sound levels must
to the attention of the proper personnel.
conform with OPNAVINST 5100.23.
Noise levels generated from GTEs are on the
Personnel Protection Programs
order of 100 to 125 decibels (db). These levels are
enough to cause partial or total deafness to
In this section we will discuss three areas that
unprotected personnel. Three primary noise
are of great concern to you as a watch stander.
sources exist in a gas turbine installation. They
are (1) the inlet passages, (2) the exhaust ducts,
handling hazardous materials.
and (3) the engine core.
Noise from the inlet passages and exhaust
ducts can be controlled by the installation of
acoustic insulation to the structure. Noise from
the engine core is controlled by the module
surrounding the engine. To prevent negation of
the soundproofing characteristics of structural
insulation, the insulation must be constantly main-
tained at a high degree of repair.
Personnel working in an environment where
the noise level is greater than 84 db must wear
approved hearing protection. If you must be in
Figure 2-10.--Out-of-calibration label (colored orange).