actions performed, the system provides data about
INVENTORY SEGMENT--A subgrouping of stock
the initial discovery of the malfunction, such as
material for physical inventory purposes. The
how the equipment malfunctioned, how many
segment may be by cognizance symbol, or Federal
man-hours were expended, what equipment was
supply class. The segment may be some other
involved, what repair parts and materials were
form of commodity grouping, like SIM items,
used, what delays were incurred, the reasons for
shelf-life material, boat spares, electron tubes,
delay, and the technical specialty or rating that
boiler tubes, fire brick, and so on.
performed the maintenance.
INVENTORY--The quantity of stocks on hand for
MAINTENANCE SOURCE CODE--A code that
which stock records (cards/listings/tape) are
identifies the source of parts or other materials
maintained. It also means that the material on hand
obtained from other than normal supply channels.
is physically inspected and counted, and stock
When applicable, it is entered on NAVSUP Form
records reconciled.
1250-1 or DD Form 1348 to document and report
ISSUE--Expenditure of material from the supply
the use of nonissued maintenance items.
officer's custody to shipboard use.
Maintenance source codes are found in the
NAVSUP P-485.
LOGISTICS APPLICATIONS OF AUTOMATED
MARKING AND READING SYMBOLS
MANDATORY TURN-IN--A term applied to
(LOGMARS)--A system designed to improve
designated repair parts and components and which
the accuracy and productivity of the receipt and
requires that the defective item be turned in when a
s t owa g e p r o c e s s . I t i s a s y s t e m u s e d b y
replacement is ordered.
S UA D P S - RT a c t iv i t i e s t o r e c o r d i n c o m i n g
MANIFEST--A detailed listing by type of all cargo
transactions by reading bar-code symbols.
loaded in any one conveyance destined for a
LOW LIMIT--The stock position that signals the
particular discharge point.
need to initiate replenishment action. It includes
MARKING--The application by stamping, printing,
the sum of stocks represented by the safety level
painting, labeling or tagging of numbers, item
and the order and shipping time (equivalent to
name, NSN, symbols, or colors on containers and
"reorder point").
items for identification during shipment, handling,
MAINTENANCE AND MATERIAL MANAGE-
and storage.
MENT (3M)--A system of recording, reporting,
MATERIAL CONTROL CODE--A one-letter code
and evaluating the maintenance requirements of
assigned by the inventory manager to indicate the
the fleet.
rate of usage or to designate those items having
M A I N T E NA N C E A S S I S TA N C E M O D U L E S
special reporting and/or control requirements.
(MAMS)--Replaceable assemblies (modules)
M AT E R I A L O B L I G AT I O N VA L I D AT I O N
needed to perform an approved maintenance plan
(MOV)--A system used to verify the unfilled
which calls for identifying the fault of failed
quantity of a requisition that is not immediately
module through progressive and/or selective
available for issue to the requisitioner, but is
module substitution. MAMs are found in the
recorded as a commitment against existing or
prospective stock dues or direct deliveries from
MAINTENANCE CODE--Two-position codes
vendors.
used in source, maintenance and recoverability
MATERIAL OBLIGATION--Unfilled quantity of
(SM&R) codes with the first position indicating
a requisition that is not immediately available for
the lowest maintenance level authorized to
issue, but is recorded by the inventory manager or
remove, replace, and use the support item. The
stock point as a commitment for future issue.
second position indicates the maintenance level
with the capability to perform complete repair.
MATERIAL RECEIPT--Gaining possession of an
item of Navy property through acceptance of
MAINTENANCE DATA SYSTEM (MDS)--A
physical custody.
basic element of the 3-M program. It provides a
means of recording maintenance actions in great
MATERLAL OBLIGATION--Unfilled quantity of
a requisition that is not immediately available for
detail. In addition to recording maintenance
AII-7
