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The primary battle telephone circuits provide means
for communication between selected battle stations
grouped on established circuits. No dialing is necessary;
when you plug in to one of these circuits, you can
communicate immediately with anyone who is plugged
in on the same circuit. Additional stations not on the
circuit may be cut in by a switchboard, which also can
cut out stations on the circuit if desired.
Since as many as 30 stations may be on the same
circuit, strict compliance with standard telephone
talker's procedure and terminology is important.
Everything a talker should know may be found in Basic
Military Requirements. As a watchstander, you must be
thoroughly familiar with it.
Battle telephone circuits vary in number according
to the size and mission of the ship. Circuits are
designated by standard symbols, each symbol consisting
of two or possibly three letters. The first letter is always
J, indicating a circuit that is part of the primary
sound-powered-battle-phone system. The other letter or
letters designate a subdivision circuit of the main
system, as shown in the list given in the next topic.
Any subdivision of the system may be subdivided
even further. In that event, each separate circuit is
identified by a number before the symbol- 1JS, for
example. Some circuits used exclusively for operations
in a single department may have no outlets on the bridge
or may have outlets that are used only in special
circumstances.
THE J CIRCUITS
It is possible that not all of the circuits listed here
may be installed in the ship you are serving on, but you
never know when you may be transferred. For this
reason, you should learn them now.
Every one of the circuits listed, if it is in the ship at
all, has an outlet on the bridge. Some of them are
manned all the time; most of them are manned during
general quarters. You must know where the outlet for
each circuit is; when the circuit should be manned; and
the type of traffic it handles.
The following explanation gives the standard
purpose of each J circuit:
The JA circuit is used by the commanding officer to
communicate with his department heads and their
assistants.
The JC is the weapons officer's command circuit on
ships having a single-purpose main battery. The circuit
is controlled by the weapons officer, but has a bridge
outlet for use by the commanding officer and the OOD.
The JF is the flag officer's circuit, controlled by the
flag. When no flag is embarked, it may be used as an
auxiliary circuit.
The 1JG is the air officer’s command circuit on an
aircraft carrier. The captain also uses it to transmit
orders that concern only the air department.
The JL is the circuit over which the lookouts report.
It is a most important channel of vital information to the
bridge, CIC, and weapons control. In wartime, the JL
circuit is manned under all cruising conditions. In
peacetime, it is manned when circumstances require
extra lookout precautions, but it may then be combined
with other circuits. The controlling JL station is on the
bridge, and the bridge talker is often designated as
lookout supervisor.
On a ship like a destroyer having a dual-purpose
main battery, the 2JC circuit serves the same purpose as
the JC on a ship having a single-purpose main battery
and a separate secondary battery. Ships having both
circuits use the 2JC as the air defense officer's circuit.
JA
Captain's battle circuit
JC
Ordnance Control
J F
Flag officer
1JG
Aircraft control
JL
Battle lookouts
2JC
Dual-purpose battery control
1JS
Sonar control
1JV
Maneuvering, docking, and catapult control
JW
Ship control rangefinders
JX
Radio and signals
J Z
Damage control
The 1JS is used as an ASW command circuit and
also as a
CIC dissemination circuit. When the 1JS is
used as an ASW command circuit, communication links
are usually found in sonar control, CIC, UB plot, and on
the bridge. This circuit enables stations on the
communication link to exchange information without
interrupting the constant flow of information on other
circuits. On some ships the 1JS is used to disseminate
CIC information to the conning, gunnery, and aircraft
control stations. The 1JS is usually controlled by the
CIC evaluator.
The 1JV, called the primary maneuvering circuit, is
the one with which the Quartermasters are chiefly
2-16
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