calibration activity (laboratory) during the reporting
HYDRAULIC ACTUATOR A device that converts
hydraulic pressure to mechanical movement.
MODIFICATION ACTIONS The number of
INACTIVE CODE An asterisk (*) preceding the
modifications performed by the related calibration
customer/laboratory code indicating that the
activity (laboratory) during the reporting period.
activity is inactive (not currently accepted by
MEASURE), and no updating occurs. (formats 100
MODULE Subassemblies mounted in a section.
MONITOR One of the principal operating modes of a
INTERLOCK A device that prevents an action from
data logger that provides a constant check of plant
taking place at the desired time, but that allows the
action when all required conditions are met.
MONITORING POINT The physical location at
JACKING GEAR An electric motor-driven device
which any indicating device displays the value of a
that rotates the turbine shaft, reduction gears, and
parameter at some control station.
line shaft at a low speed.
NO-BREAK POWER SUPPLY A device that
LINEAR Straight line relationship where changes in
supplies temporary power to the console during
one function are directly proportional to changes in
failure of the normal power supply.
NORMAL MODE Operating condition at normal
LOGIC The basic principles and applications of truth
ahead speeds, differing from maneuvering, where
tables, interconnections of off-on circuit elements,
certain functions, pumps, or valves are not required,
and other factors involved in mathematical
while others are for proper operation of ship and
computation in automatic data processing systems
and other devices.
NULL POSITION-- Condition where the output shaft is
LOGIC DIAGRAMS In computers and data pro-
positioned to correspond to that which the input
cessing equipment, a diagram representing the
shaft has been set.
logical elements and their interconnections without
ONE-LINE SCHEMATIC A drawing of a system
necessarily expressing construction or engineering
using only one line to show the tie-in of various
components; for example, the three conductors
LOGIC INSTRUCTION Any instruction that
needed to transmit 3-phase power are represented
executes a logic operation that is defined in
by a single line.
symbolic logic, such as AND, OR, NAND, or NOR.
ONE-LINE SKETCH A drawing using one line to
MAINTENANCE Work done to correct, reduce, or
outline the general relationship of various
counteract wear, failure, and damage to equipment.
components to each other.
MANUAL THROTTLE CLUTCH Means of
OPEN LOOP System having no feedback.
mechanically disconnecting the throttle hand-
OPERATING CHARACTERISTICS Combination
wheels, mounted on the engine-room console, from
of a parameter and its set point.
the reach rods that are connected to the throttle
OR GATE A gate that performs the logic OR function.
It produces an output 1 whenever any or all of its
METRL CYCLE The number of months established
inputs is/are 1.
as the optimum period of time the corresponding
PARAMETER A variable, such as temperature,
equipment can be used before recalibration is
pressure, flow rate, voltage, current, or frequency
that may be indicated, monitored, checked, or
MFR A five-character alpha/numeric or three-
sensed in any way during operation or testing.
character alphabetical code representing the
PERIPHERAL Existing on or new the boundary of a
specific manufacturer for the corresponding
surface or area.
equipment model number.
PILOT MOTOR A small dc motor that drives the
MODIFICATION MAN-HOURS The total man-
input shaft of an actuator.
hours expended on modifications by the related