Figure 1-9.-Handle locking devices for circuit breakers.
SAFETY HAZARDS AND
Out of Commission
OUT-OF-COMMISSION labels (NAVSHIPS
IC Electricians perform maintenance on
9890/7) are red labels (fig. 1-11) used to identify instru-
ments that will not indicate correct measurements
e q u i p m e n t located throughout the ship. IC
Electricians must be aware of the general and specific
because they are defective or isolated from the system.
safety precautions involved in their work. The person
This label indicates that the instrument cannot be relied
who neglects to secure the power to the salinity system
on and must be repaired and recalibrated or be recon-
(circuit SB) when cleaning cells is as likely to be
nected to the system before it can be used properly.