ENGINEMAN 1 & C
repair work to be done whenever the need for such
work arises.
Review the Maintenance and Material
Management (3-M) Manual, OPNAVINST
4790.4, it will make your planning and schedul-
ing considerably easier.
Materials and Repair Parts
The responsibility for maintaining adequate
stocks of engineroom repair parts and repair
materials belongs at least as much to you as it does
to the supply department. The duties of the supply
officer are to procure, receive, stow, issue, and
account for the support of the ship. However, the
supply officer is not the prime user of repair parts
and repair materials; the initiative for maintain-
ing adequate stocks of repair materials, parts, and
equipment must come from the personnel who are
going to use such items. Namely You!
Basic information on supply matters is given
in Military Requirements for PO 3 & 2, NAVED-
TRA 10056 (current edition), Military Re-
quirements for PO 1 & C, NAVEDTRA 10057
(current edition), and OPNAVINST 4790.4,
volume II.
Identification of Repair
Parts and Materials
Identification of repair parts and materials is
not usually a great problem when you are deal-
ing with familiar equipment on your own ship;
but it may present problems when you are doing
repair work for other ships, as you would if
assigned to the machine shop on a repair ship or
tender.
The materials and repair parts to be used are
specified for many repair jobs but not for all.
When materials or parts are not identified in the
instructions accompanying a job, you will either
have to use your own judgment or do research
to find out just what material or part should be
used. When you must make the decision yourself,
select materials on the basis of the service condi-
tions they must withstand. Operating pressure and
operating temperature are primary considerations
in selecting materials and parts for most
engineroom repair work.
The fact that materials and repair parts are
not specified in the instructions accompanying a
job does not mean that you are free to use your
own judgment in selecting parts and materials to
accomplish a job. Instead, it usually means that
you must know where to look for information on
the type of material or repair parts needed, then
locate and requisition them in order to complete
the assigned job.
There are several shipboard sources of infor-
mation that will be useful to you in identifying
the equipment and/or the repair parts needed.
They include the Coordinated Shipboard
Allowance List (COSAL); nameplates on the
equipment; manufacturer’s technical manuals;
and ships’ plans, blueprints, and other drawings.
COORDINATED SHIPBOARD ALLOW-
ANCE LIST (COSAL).—The COSAL is
both a technical and a supply document prepared
for an individual ship. It lists the equipment or
components required for the ship’s operation; the
repair parts and special tools required, the
overhaul and repair equipment, and the
miscellaneous portable items necessary for the
care and upkeep of the ship.
For your purpose, the COSAL is the basic
source of information on repair parts and
materials needed for a job. A COSAL gives you
information on such items as the noun name of
a system (engine, pump, ejector, etc.), the
manufacturer’s name and the I.D. number
(General Motors Corporation #3255), the
technical manual number for the system, the
manufacturer’s drawing numbers, and the
Allowance Parts List (APL) numbers for related
systems (governor’s, starters, transmissions, etc.).
In addition, COSAL provides specific informa-
tion about National Stock numbers (NSNs), units
of issue, costs, and the number of items needed.
It may also include lists of part numbers and
Federal Stock Numbers (FSNs) for crossover
checks.
To request materials and repair parts from the
supply department aboard ship, you must fill out
and submit a NAVSUP Form 1250, a single item
consumption/management document. If the item
is not stocked aboard ship, the supply department
will requisition the material from a supply activity,
using the identifying information that you have
given on the NAVSUP Form 1250. However, if
2-20
