NSN—National Stock Number.
NTP—Navy Training Plan.
O-LEVEL—Organizational Level.
OHM—A measurement of electrical resistance.
OJT—On-the-job training.
OPNAV—Office of the Chief of Naval Operations.
OPTAR—Operations (or Operating) Target (funding).
OSI—Operating space item.
PARALLEL—Being arranged so that two or more
lines, such as centerlines or lines along outside
edges, can all be at right angles to one common
line.
PEB—Pre-Expended Bin.
PEEN—To change the shape of a metal part by striking
with a hammer.
pH NUMBER—A number used to measure the acidity
or alkalinity of a solution; pH values run from 0
through 14.
A value of 7 indicates neutrality;
numbers less than 7 indicate acidity, and numbers
greater than 7 indicate alkalinity.
PICKLE—To clean castings or forgings in a hot weak-
sulfuric-acid bath.
PITTING—Small deep cavities with sharp edges.
May be caused in metal surfaces by high impacts or
by oxidation.
PME—Precision Measuring Equipment.
PMS—Planned Maintenance System.
PNEUMATIC—That which is operated or moved by
the use of pressurized air.
POWER PACKAGE—Provides and maintains the
hydraulic pressure to raise and lower the barricade
stanchions.
PQS—Personnel Qualification Standards.
PRESSURIZE—To compress air or hydraulic fluid to
a pressure greater than normal.
QA—Quality Assurance.
QAI—Quality Assurance Inspector.
QDR—Quality Deficiency Report.
RAC—Rapid Action Change.
REEVE—To pass a cable or rope through a sheave,
hole, ring, or similar object.
REMOVAL TORQUE—The minimum torque re-
quired to remove an installed screw, measured with
no axial load in the screw and while the screw is in
motion.
SATURATED STEAM—Steam that contains mois-
ture.
SAYBOLT SECONDS UNIVERSAL—A unit of
measurement of fluid viscosity as determined by a
Saybolt viscometer. (The higher the SSU number,
the more viscous the fluid.)
SCORING—Deep grooves in a surface caused by
rubbing when fine, hard particles are forced
between moving surfaces (as in a bearing and
journal), or when a moving part is not supplied with
lubricant.
SE—Support Equipment.
SECDEF—Secretary of Defense.
SECNAV—Secretary of the Navy.
SECURE—Tighten joints or fasteners.
SEIZING—A wrapping, consisting of several turns of
light line or wire, placed around the cut end of a
wire rope to prevent the strands of the rope from
unraveling.
SEIZING—The stopping of motion between two
contacting surfaces because of lack of lubrication.
SFOMS—Ship's Force Overhaul Management Sys-
tem.
SFWP—Ship's Force Work Package.
SHEAR—A break in a part caused by an external
pressure.
SHIPALT—Ship Alteration.
SI—Ship Installation,
SIMA—Shore Intermediate Maintenance Activity.
SLEP—Service Life Extension Program.
SM&R—Source, Maintenance, and Recovery Code.
SNAP—Shipboard Non-tactical ADP Program.
SPALLING OR FLAKING—A breakdown of the
surface metal over a small area, resulting in the
surface metal's becoming loose and detached from
the base material.
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