light differs from that laid down for the directional
flashing light, as follows:
1. The call consists of a collective call sign or a
number of call signs repeated until answered by all
2. Each receiving station answers by transmitting
a continuous series of Ks until the calling station, seeing
that all the receiving stations have answered, stops
calling, waits a short time, then starts transmitting the
message. When practicable, receiving stations should
use a directional light of minimum brilliance.
3. Where repeating ships are used, they will repeat
the originator's transmission word by word as received.
4. During transmission of the message, all
receiving stations keep their signal lights out. Should a
receiving station miss a portion of the message, that
station is to request a repetition in the normal manner
upon completion of the transmission. A station that is
repeating the message as received but misses a portion
may substitute the operating signal ZEP for the missing
portion and proceed with the transmission. When the
missing portion is obtained, it is transmitted in the form
of a correction.
ZEP means this portion (or message) was
incompletely received. Each word or group missed,
which is indicated by the position of ZEP in the
message, will be forwarded as soon as obtained.
5. Receiving stations, after checking, receipt for
the message by making RRRR.
6. When the prosign F is used in the non-
directional procedure, no ship is to make any response
to this call or to receipt for the message. Ships that miss
the transmission or any portions thereof may request
repetitions by directional flashing light from adjacent
ships. In requesting such repetitions, ships should bear
in mind the danger of disclosing the tactical
composition of the formation.
7. The separative sign is used between coded
Where a special non-directional daylight
signaling lantern (DSL) is fitted, the procedure to be
used by the transmitting station is the same as
prescribed for the non-directional procedure.
Receiving stations answer by hoisting DESIG.
Repetitions are obtained in the same manner as for the
non-directional procedure. The message is receipted
for by hauling down DESIG.
When calling another station, you are responsible
for certain details. In visual communications, the
identity of the calling station is usually apparent, and
it is necessary only to gain the attention of the station
being called. Normally this is done by directing the
signal light at the station and making the receiving
station's call sign until answered When it is desirable
to identity the calling station, use the full call. This
consists of the call sign of the station called, and when
answered, the prosign DE and the call sign of the
calling station. On occasion, when using the
no-response procedure, it may be necessary for you to
transmit the full call before or without being answered
Examples: Abbreviated callD15 (until
Full callD15 (until answered) DE
A22 or D15 DE A22
Collective or multiple calls may be used as
required. A collective call sign consists of a single call
sign representing more than one station: C Squad 2. A
multiple call may consist of two or more individual or
collective calls: C Squad 2 C40. Both collective and
multiple calls may be followed by the prosign DE and
the call sign of the calling station.
Call signs and address groups that may be used in
the heading and/or ending are visual call signs from
ACP 129, call signs from ACP 113, and address
groups from ACP 100.
The call may serve as the address. When
abbreviated calls are used, it is assumed that the
message is addressed from and to the senior officer
embarked. When this is not the case, use a full call or
the address component.
ANSWERING AND RECEIPTING
The answer normally consists of the prosign K.
The calling station may flash for the series of Ks from
each unit until all units have responded. If necessary
to distinguish which of several stations is being
answered, the prosign K should be preceded by the call
sign of the station answered.
Where more than one station is being called in the
same direction or during low visibility, the answering
station may need to indicate its own identity when
answering. This is done by transmitting the prosign
DE followed by own call sign and prosign K.