with other civil stations unless it is known that the
station concerned is familiar with this series.
QOA-QQZ: Reserved for the maritime service.
QRA-QUZ: Allocated to the International
Telecommunications Union (ITU). All civil stations
should have a copy of this series. Therefore, this series
may be used with all civil stations unless the station
concerned indicates it is unfamiliar with the series.
QVA-QZZ: Not allocated.
ZAA-ZXZ: Allocated to the Allied military; held
by all military stations.
ZYA-ZZZ: Reserved for temporary or permanent
assignment of meanings on an intra-military basis by
any nation, service, or command authorized use of
Use of Operating Signals
Operating signals either answer a question, give
an order, or give advice.
Order: ZJLhoist the following signals.
Info: ZJI NKZOCall sign of ship in
company is NKZO.
In Allied military stations, a question or request
can be implied by preceding the signal with the
Example: INT QRUHave you anything for me?
INT ZJIWhat are the call signs of ships in
company with you?
In reply to a question, an affirmative or a negative
sense can usually be implied by using just the basic
Example: The reply to INT ZOE would be ZOE.
If desired though, the operating signal ZUE
(affirmative) or ZUG (negative) may be used alone or
in conjunction with the signal.
Example: The reply to INT ZOE may be ZUG or
In non-Allied military or civil stations, a question
can be implied by use of the prosign IMI following the
Example: QAR 10 IMIMay I stop listening on the
watch frequency for 10 minutes?
In reply to a question in the affirmative or negative
sense, the letter C (affirmative) or N (negative) is used.
Example: The reply to QAR 10 IMI would be QAR 10C.
Call signs normally will follow the Q or Z signals;
however, they also may precede the operating signal
for separation or clarity.
Q and Z signals with numbered alternate meanings
will be followed, without spacing, by the appropriate
number to indicate the meaning intended.
Example: ZJH1 means: Your light is unreadable,
not trained correctly.
Time groups used with Q or Z signals always will
be followed, without spacing, by a zone suffix.
Any nation, service, or command may prohibit or
restrict the military use, within its area of jurisdiction,
of any operating signal. However, when such
operating signals are received from other users, they
must be recognized and acted upon.
A knowledge of operating signals is a must for all
Signalmen. Section J of ACP 131 contains visual
operating signals. Study this section to become more
efficient in your job.
VISUAL RELAY RESPONSIBILITY
In visual communication, relaying is accom-
plished automatically when the call-up is made using
collective call signs. A message should be relayed
concurrent with its reception, when possible, to cut
down the time delay between the end of the
originator's transmission and its delivery to the final
Chain of Visual Responsibility
The general rule for determining the responsibility
for any situation is that each addressee is responsible
for delivery of the message to addressees beyond
themselves in the general direction away from the
originator. No rule set forth here, or prescribed by
responsible commanders, is to be interpreted as
restricting the initiative of any ship in relaying a
message to an addressee who does not respond when
called. It is the duty of any ship to expedite the
transmission of a message by relaying when it is
evident that she is in a better position to effect the
necessary relay than the ship specifically responsible.
When a maneuver alters the position of units and
ships relative to the officer in tactical command
(OTC), the responsibility for relaying the signals does
not alter until completion of the maneuver by all ships.