signal is not hoisted to the dip; instead it is hoisted
closed up after the signal is understood by the
To question signals from the INCSEA agreement,
the signal YVpl TACK ZLp3 will be used.
To cancel signals from the INCSEA agreement,
the code pennant followed by either YN or ZP must
precede the group that cancels.
SPECIAL WARNING SIGNALS
To inform foreign naval vessels that they have
violated Soviet spaces, will use the warning signals
You have violated the state border of the Soviet
Union. I demand that you leave Soviet Union
I demand that you leave the waters of the Soviet
Union immediately. Unless you do so, a force
of arms will be used against you.
You are violating the regulations for navigating
and remaining in Soviet Union waters. I
demand that you cease violations.
Despite warnings, you continue to violate the
regulations for navigating and remaining in
Soviet Union waters. You are to leave them
During the day, these signals will be made by
flags. During nighttime, these signals are made by
Morse code using a signal lamp. Radiotelephone may
also be used to transmit the signal, as well as voice
using a megaphone or any other amplifying device.
WARNING SIGNALS TO SUBMARINES
The signal of two series of explosions with three
explosions in each series (where the interval between
the explosions in a series is 1 minute and the interval
between the series is 3 minutes) means You are in
Soviet Union waters. I demand you surface
immediately. Unless you comply with this order
within 10 minutes, a force of arms will be used against
An acoustic signal by sonar may be given
simultaneously, with the same meaning as stated
previously. The signal will consist of five dashes, each
dash 3 seconds long, and the interval between dashes,
LEARNING OBJECTIVES: Explain the
procedures for the use of the index.
The index is divided into two separate indexes:
Index 1 is the Signaling Instructions and General
Signal Code and Index 2 is the Medical Signal Code.
USE AND CONSTRUCTION OF GROUPS
The types of signals used are the following:
Single-letter signalsIndicate very urgent,
important, or very common use
Two-letter signalsThe general code
Three-letter signalsBegin with M and indicate
the medical code
The Code follows the basic principle that each
signal should have a complete meaning. This principle
is followed throughout the Code. In certain cases,
complements are used when necessary to supplement
the available group.
To find a certain group when encoding, always
turn first to the signal index or medical index, as
appropriate, and pick out the key word or phase.
Do you require a boat? KEY WORD: Boat
Explosion has occurred in tank. KEY WORD:
The use of complements is explained in the
following paragraphs. You as a Signalman must know
how to use complements to effectively communicate
Variations in the meaning of the basic signal:
CPI am (or vessel indicated is) proceeding to