Inactive

procedures performed daily or weekly. The requirement

the label should bear the notation "Not used for

quantitative measurements."

for calibration by the user and the calibration interval

(each Use, daily, weekly, every 100 hours, each overhaul,

REJECTED

and so on) is indicated in the METRL. The User

Calibration label (black lettering, white background)

In the event an instrument fails to meet the

must be used when the calibration is performed by the

acceptance criteria during calibration and cannot be

user. This label is not replaced at each calibration. When

adequately repaired, a Rejected label (black lettering,

the label is first affixed to the instrument, a notation is

red background) must be placed on the instrument. All

made about the appropriate calibration interval. Records

other servicing labels must be removed. In addition to

of calibrations performed, when other than each time

the Rejected label, a Rejected tag giving the reason for

used, are maintained in conformance with normal

rejection and any other pertinent information is affixed

maintenance practices; that is, maintenance log and

to the instrument. The Rejected label and tag remain on

maintenance action form.

the instrument until it is repaired and recalibrated. The

instrument MUST NOT be used while bearing a

INACTIVE

Rejected label.

If an individual instrument due for recalibration is

CALIBRATION VOID IF SEAL BROKEN

not expected to be used for some time in the future,

recalibration may be indefinitely postponed by affixing

This label (black lettering, white background) is

an Inactive label (green lettering, white background) to

placed over readily accessible (usually exterior)

the instrument. The Inactive label must remain on the

adjustments to prevent tampering by the user when such

instrument until the instrument is recalibrated, and the

tampering could affect the calibration. The label must

instrument will NOT be used while bearing the Inactive

not cover any adjustments or controls that are part of the

label. It must be calibrated before it can be used.

normal use and operation of the instrument. This label

is also used to prevent removal and/or interchange of

plug-in modules, subassemblies, and so on, when such

CALIBRATION NOT REQUIRED

removal or interchange can affect the calibration.

Standards and TAMS not requiring calibration are

WATCH STANDING

shown as NCR in the METRL. The No Calibration

Required label (orange lettering, white background) is

Shipboard personnel stand a variety of watches, all

affixed to and should remain on the instrument until its

important to the ship and to the ship's company. In

calibration requirements change. When an instrument is

particular, your personnel stand the IC and gyro room,

not listed in the METRL as NCR, the following criteria

telephone switchboard, damage control central, and

must be used for placing the instrument in the No

sounding and security watches. The IC and gyro room

Calibration Required category:

watch is long and usually uneventful until a gyro alarm

sounds or until the electrical supply is shifted. At this

1. The instrument does not make quantitative

time, the person on watch must be alert. There are

measurements nor does it provide quantified outputs.

always minor repairs needed, such as to sound-powered

2. The device is "fail-safe" in that any operation

telephones, which can be used to keep the person alert,

beyond specified tolerances will be apparent to the user.

but "skylarking" should be outlawed. The telephone

3. All measurement/stimulus circuits are either

switchboard operator should be well indoctrinated, and

monitored by calibrated instruments during their use or

then periodically checked to make sure he/she is

rendering good service to the ship. Personal calls require

are dependent on external, known or calibrated, sources

for performance within required limits.

specific permission, and your operator should require

adherence to regulations in this regard. The damage

When it is determined that an instrument falls into

control central and sounding and security watches are

the Calibration Not Required category, the label is

independent watches and are under limited supervision.

annotated as to the authority on which the decision was

based, such as METRL, technical manual, letter, or

You should make sure your personnel are

message from higher authority. In the case of

performing their watch standing duties properly and

instruments that normally require periodic calibration

alertly. When problems occur, take immediate action.

but are not used to perform quantitative measurements,

Only through careful counseling, adequate instructions,

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