M-1R: Monthly or every 600 hours, whichever
W-3R: Weekly or after each use, whichever occurs
S-1R: Semiannually or during each upkeep period,
whichever occurs first.
Q1-1R: Quarterly or prior to getting underway,
whichever occurs first.
When the periodicity code includes a situation
requirement (such as R-1 or Q-1R), a note of
explanation is required in addition to the basic code.
This note is the first entry in the Procedure block.
description is a brief definition of the PMS action to be
RATES.The rate is the recommended skill level
of the person who should be qualified to do the work,
Classification). Qualified personnel other than those
specified may be assigned. When more than one person
in the same rate is required, the appropriate number of
persons precedes the rate. When more than one person
in the same rate is required and time requirements are
not equal, each person is listed separately.
average amount of time required of each rate listed in
the Rates block to perform the maintenance, on each
piece of identical equipment, listed in hours and tenths
of an hour. When more than one person in the same rate
is required and time requirements are equal, man-hours
listed are the sum of their requirements. When more
than one person in the same rate is required and time
requirements are not equal, man-hours are listed for
each person separately. Total man-hours are the sum of
all entries in the M/H block. Make ready and put away
anything that interferes with the maintenance (covers,
other equipment, and so on) is not included.
SAFETY PRECAUTIONS.This section of the
MRC provides a listing of precautions and publications
that direct attention to possible hazards to personnel or
equipment during maintenance. The word NOTE
will precede procedural advisories. Specific categories
of direction are as follows:
Warning: Explains operating procedures,
practices, and so forth, that, if not followed
correctly, may lead to injury or death. Warnings
are listed in the Safety Precautions block and are
repeated preceding the procedure involved.
practices, and so forth that, if not correctly
followed, may lead to damage to equipment.
Cautions are not listed in the Safety Precautions
block; however, they do precede the instructions
for the procedure involved.
EQUIPMENT.This section lists the test equipment,
materials, parts, tools, and miscellaneous requirements
necessary to perform the maintenance action. Each of
the above categories may include both Standard PMS
Item Name (SPIN) and non-SPIN items. Entries in this
block can be cross-referenced to the Standard PMS
Materials Identification Guide (SPMIG) for stock
Equipment Guide List (EGL)
The EGL (OPNAV Form 4790/81) (fig. 7-5) is a
5x8-inch card that is used with a controlling MRC
when the MRC applies to a number of identical items,
such as motors, controllers, life rafts, valves, test
equipment, and small arms. Each ship prepares its own
The number of items included on an EGL is
directly related to the time to do the maintenance on
each item. Each EGL normally contains no more than a
single day's work. If more than 1 day is required,
separate EGL pages are prepared for each day and are
In some instances it may be unnecessary or
impractical to list the equipment on EGLs. For
Calibration Recall Program is in effect, a notation of the
applicable instruction in the Location block of the
MRC is all that is required.
Tag Guide List (TGL)
The TGL (OPNAV Form 4790/107) (fig. 7-6)
contains the information necessary for equipment
tag-out required during PMS actions. The TGL
contains the number of tags required, locations of the
tags, position of each tagged item (open, shut, off, on,
and so on) and permission or notification requirements.
Each ship prepares its own TGLs.