(DG), and security alarm (FZ) circuits. Not all of the
feed booster pump, smoke watch, DCC, control engine
room, auxiliary control engine room, and Repair 5.
miscellaneous circuits transmit verbal messages.
Some of the circuits are used for alarms that have a
CIRCUIT 4JV is the engineering circuit for fuel
definite meaning. You will become acquainted with
and stability. This circuit provides communication
most of the miscellaneous circuits aboard ship while
between DCC, the oil king, controls the engine room,
performing your daily duties.
secondary DCC, Repair 5, fuel oil transfer pumps, fuel
oil manifolds, and sounding tubes.
INTERCOM UNITS
CIRCUIT 5JV is an engineering circuit that
Intercom units (circuit 4MC) provide fast and
provides communication between each ship's service
dependable two-way communication between DCC
power switchgear group, each load center switchboard,
and each repair party locker. Using extra speakers at
each emergency power switchboard, each IC/gyro
various places can provide one-way communication
room, each turret power transfer panel, DCC, secondary
from each repair party locker to its unit patrol stations.
DCC, Repair 5, and steering gear room.
SHIP'S SERVICE TELEPHONES
CIRCUIT JL is for surface and sky lookouts. The
Many ships use ship's service telephones for
circuit is used primarily to pass reports from lookouts
damage control communications when there are
to the captain, gunnery officer, and CIC. Because of the
telephones installed at or near repair party lockers. The
location of the lookouts topside, they can help locate
damage caused by high-angle shellfire and bombs.
ship's service telephones are standard telephones.
They may be either rotary-dial or push button. The
Emergency Circuits
majority of the compartments aboard ship will have a
Emergency circuits are used to provide a means of
telephone installed within them. However, do not
reestablishing communications once a casualty has
depend too much on this system. It is not part of a
occurred to the primary lines. The emergency
rugged battle system, and it could easily be knocked
sound-powered circuit of main concern to damage
out of commission early during battle action.
control personnel is the X40J casualty control
SHIP'S GENERAL ANNOUNCING SYSTEM
communication circuit. The X40J circuit provides
(1MC CIRCUIT)
portable emergency communications between the
main below-deck stations after casualties have
The circuit that will affect you the most is the
occurred to the primary circuits. Portable leads are
general announcing system circuit identified as 1MC.
used for communication between the outlets that are
The 1MC is used to pass information to the ship's crew
permanently connected to the below-deck stations
on a regular basis each day. It is also another means of
forming this emergency circuitry. The below-deck
damage control communication because information
stations are usually located in the firerooms, engine
can be passed throughout the ship.
rooms, forward and aft IC rooms, emergency generator
The 1MC system should be used only to pass
rooms, DCC, and steering gear rooms. These stations
have individual single-gang jack boxes. These boxes
warnings or vital information that affects the entire
are permanently installed and connected to individual
ship's company. When information does not affect the
four-gang jack boxes above decks. The four-gang
entire ship and other communication methods are
outlets are wired in parallel but are not interconnected.
available, the 1MC should NOT be used.
Repair party lockers are equipped with portable
MESSAGE BLANKS
jack boxes and two-conductor twisted cable. These are
A written message is another means of passing
commonly referred to as salt-and-pepper rigs. The
information within the damage control organization. To
salt-and-pepper rigs may be used to connect the
standardize this method of communication, you should
individual X40J circuits to operating primary or
use preprinted message blanks (fig. 2-3). To write out a
auxiliary circuits or directly to the bridge.
message word for word takes unnecessary time.
Miscellaneous Circuits
Therefore, to expedite message preparation, you should
use damage control standard abbreviations (fig. 2-4) and
There are several miscellaneous circuits that
provide for the transmission of information of direct
damage control standard symbology (fig. 2-5). A
interest to damage control stations. These circuits
detailed listing of damage control standard symbology
include the flooding alarm (FD), remote draft indicator
is provided in Appendix III of this NRTC.
2-14
