THE INTERNATIONAL CODE OF SIGNALS

649

Omitting the Call and Identity.

When two ships are signalling for a considerable period and several
messages are passed between them, the call and identity need be signalled
m the first message only, in order to avoid delay.

Example 1.—A Simple Message.

Ship Orotava (signal letters G N B T) wishes to signal to ship Oroya
signal letters G B F Y. the following message: "Owners have agreed to
discharge cargo at Aden."

Component
Ship Orotava transmits
Ship Oroya receives and makes

Call
A A A A A A etc.

TTTTTT etc.

Identity -I
De GN BT GBFY ^~-
De G N B T — G BF Y

Break Sign
BT
BT

Owners
T

have
T

agreed
T

Message
to
T

discharge
T

cargo
T

at
T

Aden
T

Ending
TR
R

NOTE.—The interchange of signal letters is always repeated in
acknowledgment, but when identity has been established they are not
repeated in further communication between the ships.
Example 2,—A Coded Message.
Messages may be morsed by transmitting the appropriate signal
letters from the Visual Code book.
The letters P R B mean "The International Code of Signals."
Group KMG means "Owners have agreed to discharge cargo at."
Group A A G F means "Aden." An alternative method of Example 1
oi making this message would be as follows:—The call and the break
sign are made and answered as usual, but each Code group as above