STERN TUBE--(1) The bearing supporting
SHIP'S SERVICE DIESEL GENERATOR
the propeller shaft where it emerges from the ship.
(SSDG)--The SSDG is the main source of elec-
(2) A watertight enclosure for the propeller shaft.
trical power for a ship. It uses a diesel engine as
the prime mover for the generator.
STERN TUBE FLUSHING WATER--Water
SHIP'S SERVICE GAS TURBINE GEN-
circulated through the stern tube from inboard
ERATOR (SSGTG)--The SSGTG is the main
to prevent accumulation of debris in the stern tube
source of electrical power for a ship. It uses a gas
while the ship is at rest or backing down.
turbine engine as the prime mover for the
generator.
STRAIN--The deformation of a material
body under the action of applied forces (stress).
SHORT CIRCUIT--A low resistance connec-
tion between two points of different potential in
STRIPPING SYSTEM--A system provided
a circuit.
to strip all petroleum tanks of water and sediment.
SHUTTLE VALVE--A valve that is used to
STUFFING BOX--(1) A chamber and closure
direct fluid automatically from either the normal
with manual adjustment for a sealing device. (2)
source or an alternate source to the actuator.
A device to prevent fluid leakage between a
moving and a fixed part in a steam engineering
SIGNAL CONDITIONING ENCLOSURE
plant. (3) A fitting designed to permit the free
(S/CE)-- A part of the PAMISE that provides the
passage or revolution of a rod or a pipe while
major input interface between the propulsion
controlling or preventing the passage by it of
plant machinery and the ECSS control consoles.
water, steam, and so forth.
The S/CE accepts inputs from the plant
machinery and outputs normalized signals to the
ECSS control consoles. It also has alarm detec-
STUFFING TUBE--A packed tube that
tion and alarm output circuitry. One S/CE is
makes a watertight fitting for a cable or small pipe
located in each main engine room and one is part
passing through a bulkhead.
of the CISE (located in CCS) on a DD or CG class
ship.
SUMMARY ALARM/FAULT--An indica-
tor at a console that indicates to an operator that
SOLID STATE--A class of electronics com-
one of several abnormal conditions has occurred
ponents, such as transistors, diodes, integrated
on a certain piece of equipment.
circuits, silicon controlled rectifiers, and so forth.
SYNCHRO SELF SHIFTING (SSS)
SPECIFIC GRAVITY--The ratio of the
CLUTCH--The SSS clutch is a fully automatic,
weight of a given volume of any substance to the
freewheel device that transmits power through
weight of an equal volume of distilled water. Since
gear-toothed elements.
the distilled water weighs approximately 62.4
pounds per cubic foot, any substance which
SYNCHRONOUS-- Happening at the same
weighs less than this has a specific gravity of less
time.
than one and will float on water. Any substance
of greater weight per cubic foot has a specific
SYSTEM-- A grouping of components or
gravity of more than one and will sink. Specific
equipment joined to serve a common purpose.
gravity of gases is based in a like manner on the
weight of air.
SYSTEM INTERRELATION--Specific in-
dividual operations in one system affecting the
SPECIFIC HEAT--The amount of heat
operation in another system.
required to raise the temperature of 1 pound of
a substance 1F. All substances are compared to
TACHOMETER GENERATOR--A device
water, which has a specific heat of 1 BTU/lb/ F.
for converting rotational speed into an electrical
quantity or signal.
SPLIT PLANT CONFIGURATION
(MODE)-- The condition in which only one
TAIL SHAFT--The aft section of the shaft
engine of a set is driving the reduction gear/pro-
that receives the propeller.
pulsion shaft.
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