used in loading and unloading cargo, ammunition, fuel,
and general stores.
Signalman. The insignia for the Signalman (SM)
rating is represented by the crossed semaphore flags.
SMs stand watches on signal bridges where they
send and receive messages by flashing light,
semaphore, and flag hoist. They prepare headings and
addresses for outgoing messages; handle, route, and file
messages; encode and decode message headings;
operate voice radio; and maintain visual signal
equipment. They also render passing honors to ships
and boats and display ensigns and personal flags during
salutes and during personal and national honors. They
additionally perform duties of lookouts; send and
receive visual recognition signals; repair signal flags,
pennants, and ensigns; take bearings; recognize visual
navigational aids; and serve as navigators assistants.
O C C U P A T I O N A L F I E L D 2 ( S H IP
OPERATIONS). This occupational field includes
the ratings of Operations Specialist (OS) and
Operations Specialist. The insignia for the
Operations Specialist (OS) ratingis represented by an
arrow going through an oscilloscope.
OSs function as plotters and radiotelephone and
command and control sound-powered telephone talkers
and maintain combat information center (CIC) displays
of strategic and tactical information. They operate
surveillance and altitude radars, and identification
friend or foe (IFF) systems and associated equipment
and serve as watch supervisors and section leaders.
During watch conditions, OSs interpret and evaluate
presentations and tactical situations and make
recommendations to superiors. By applying their
thorough knowledge of official doctrine and required
procedures for CIC operations and radar navigation,
OSs provide their commands with technical
information and assistance related to antisurface
warfare, anti air warfare, antisubmarine warfare,
amphibious warfare, mine warfare; naval gunfire
support, and search and rescue operations. OSs plan,
organize, direct, and administer shipboard training
programs and provide technical information and advice
on capabilities, limitations, reliability, and operational
readiness of CIC equipment.
Quartermaster.The rating insignia for
Quartermaster (QM) is represented as a ships wheel.
QMs stand watches as assistants to officers of the
deck (OODs) and navigators. They serve as steersmen
and perform ship control, navigation, and bridge watch
duties. They also procure, correct, use, and stow
navigational and oceanographic publications and
oceanographic charts. QMs maintain navigational
instruments and keep correct navigational time. They
also render honors and ceremonies according to
national and foreign customs. They send and receive
visual messages and serve as petty officers in charge of
tugs, self-propelled barges, and other yard and district
OCCUPATIONAL FIELD 3 (MARINE
ENGINEERING). The ratings included in this field
are Boiler Technician (BT), Electricians Mate (EM),
Engineman (EN), Gas Turbine Systems Technician
(GS), Interior Communications Electrician (IC), and
Machinists Mate (MM).
Boiler Technician.The insignia for the Boiler
Technician (BT) rating is represented by a Heros boiler.
BTs operate and perform organizational and
maintenance on marine boilers, pumps,
blowers, and heat exchangers. They