HERTZ—International unit of frequency, equal to
one cycle per second.
N
NAVSAT—Naval Satellite.
I
IMPINGEMENT—To have an effect on the
property or rights of another.
IN-PHASE—This term is applied to the condition
that exists when two of the same frequency pass
through their maximum and minimum values of
like polarity at the same instant.
I/O—Input/Output.
IOC—Input Output Controller.
J
JOULE—A unit of energy or work. A joule of
energy is liberated by 1 ampere flowing for 1
second through a resistance of 1 ohm.
JR—Junction Rotary switch.
K
KILOWATT—A unit of electrical power, equal to
1,000 watts.
NAVSTAR—Naval Global Positioning System
Satellite.
NAVSEA—Naval Sea Systems Command.
O
OPEN-LOOPED—One-pass, a seawater system in
which the seawater flows through the system
only once.
P
PBI—Push-button indicator.
PITCH—Degree of slope or inclination.
POLY-PHASE—Having, generating or used in
generating currents consisting of three or a
multiple of three phases.
PM—Planned Maintenance.
PMS—Planned Maintenance System.
PSIG—Pounds-per-square inch gage.
L
R
LINEAR—Straight line relationship where changes
in one function are directly proportional to
changes in another function.
LINES OF FORCE—A line in an electric or
magnetic field that shows the direction of the
force.
M
MAKEUP WATER—Distilled water that is added
to the expansion tank when level becomes too
low.
MERIDIAN—True North.
MICRON—A unit of length equal to 104 meter.
Also called a micrometer.
MRC—Maintenance Requirement Card.
RADAR-Radar Detection and Ranging.
REQ—Request.
ROLL—To move gently around and around or from
side to side.
S
SEAWATER—Water that is drawn from the sea by
the ship.
SERVO—A device used to convert a small
movement into one of greater movement or
force.
SINGLE-PHASE—Having, generating, or using a
single alternating current, either in phase or
180° out of phase.
AI-3
