equipment, such as rubber gloves and shorting probes
before using them.
NEVER WORK ALONE ON ENERGIZED
On ships with minimum manning, you may not have
the option of using another ET as a safety observer.
Make sure that whoever is going to observe you is CPR
qualified. Brief your observer on what you will be
doing. Physically show him or her where the cut-off
switch is located. Have him or her stand by at a safe
distance with a rope or wooden cane to pull you from
the equipment, should you get hung up. Follow
procedures outlined in ET Volume 1 for voltage checks.
As we mentioned earlier, when you work aloft on
radar antennas, your man-aloft chit protects you from the
RF radiation hazards. But, you also need to be protected
from falling. Do the required PMS for safety harnesses
every time you use the harness. And remember, even a
good harness cant save you unless you use it right. When
you go up the mast attach your harness properly so you
cant free fall to the deck. Attach a line to any tools you
carry up, so they are unable to fall freely. Set the cut-off
switches for any antennas along your way.
NEVER WORK ALOFT
Its your life; pick good safety observers. Your
safety observers should be aware of what type of
maintenance youre going to do. They also need to
know whom to contact if you run into technical
Safety Observers are responsible for the safety of those
walking underneath you as well as for your safety. They
should position themselves so you can communicate with
them without having to come down. The safety observer
will pass your information to everyone else. If something
is falling, communicate quickly.
CATHODE-RAY TUBES (CRTS)
Cathode-ray tubes are part of radar scopes. You will
definitely have to work around them. You will probably,
at one time or another, pack or unpack, install, repair, or
dispose of one.
There are some very real dangers
associated with handling a CRT. Always take the
precautions discussed in ET Volume 1 whenever you
handle a CRT.
Never think about electronics without thinking
about safety. Learn from the safety information you get
from the Ships Safety Bulletins, Navy mishap reports,
and personal experience. Follow established
procedures and all safety instructions. Live longer.
Weve discussed many aspects of radar in this
In ET Volume 7, Antennas and Wave
Propagation, we will provide specific information
about radar antennas, waveguides, and transmission
lines. Then in ET Volume 8, System Concepts, we will
discuss specifics on radar cooling systems.