When a piece of equipment becomes inoperative
because of a broken part, you must replace the broken
part. If you do not have a replacement or spare part, you
must order one from supply.
What must you do to obtain materials from the
supply department? What forms are used to requisition
materials? As a petty officer, you should be able to
answer those questions. Why is that so important?
Because as a petty officer, you may be the work center
supervisor responsible for maintaining the equipment
within your center.
The purpose of this chapter is to help you become
familiar with the workings of the supply department. By
understanding how the supply department works, you
can use the Navy supply system to help you carry out
your duties more effectively. You will be provided
information on material identification (that is, national
stock number format, etc.), requisition documents, and
This chapter is not intended to make you an expert
in the area of supply. Rather, it is designed to give you
a basic understanding of supply matters to improve your
The following definitions of the basic supply terms
should help you understand the material in this chapter:
CONTROLLED EQUIPAGEItems requiring
special management control because the material is
essential to the protection of life or is relatively valuable
and can be converted easily for personal use.
LOGISTICSThe science of planning and carrying
out the movement and maintenance of military forces. In
its most comprehensive sense, logistics involve those
aspects of military operations that deal with the
1. Design, development, acquisition, storage,
evacuation, and disposition of material
operation, and disposition of facilities
Acquisition and furnishing of services
Movement, evacuation, and hospitalization
MATERIALAll items necessary to equip,
operate, maintain, and support an activity.
SUPPLIESAll items necessary to equip, maintain,
and operate a military command, including food,
clothing, equipment, arms, ammunition, fuel, materials,
and machinery of all types.
maintenance (while in storage), and salvage of supplies,
including the determination of the type and quality of
SUPPLY CONTROLThe process by which an
item of supply is controlled within the supply system,
including requisitioning, receipt, storage, stock control,
shipment, disposition, identification, and accounting.
Learning Objectives: Recognize the different types of
stock and control numbers. Recall the purpose of
cognizance symbols. Recall the purpose of the special
material identification code. Recognize sources of
identifying material when a stock number is not
available. Recognize the uses of the following supply
publications: ML-N, MCRL, MRIL, ASG, and COSAL.
What is meant by material identification? Why is it
necessary? What tools are available for you to use in
identifying material? The problem of material
identification is not peculiar to the Navy or the military.
You probably have had occasion to purchase a part for
your car or an appliance or to use a mail-order catalog.
Those items were all identified by a catalog or part
number as part of the manufacturers or suppliers
identification system. Companies use an identification
system for the same reason the Navy does. It is a brief,