In the DC scenarios, WIFCOM hand-held
transceivers are issued to the investigators and scene
leader. They are the primary means of communication in
the repair station area of responsibility. The 21J (or other
designated) sound-powered telephone circuits are the
primary means of communication between repair lockers
and DCC. Personnel using WIFCOM must be aware of
specific zones of reduced transmission capability or dead
zones. Secondary communications, such as messenger or
via second WIFCOM operator, must be used to
communicate through dead zones. If emission control is
necessary, special consideration must be given
WIFCOM. In watertight areas during material condition
ZEBRA, WIFCOM transmissions may be interrupted.
These transmissions can be made only with command
approval. In case of WIFCOM failure, repair locker
personnel should establish effective communications as
quickly as possible using other methods.
REVIEW 6 QUESTIONS
Q1. Your phone system is unsecured. When
receiving a call, you should answer the phone by
saying—
Q2. What system is tied into the IMC circuit?
Q3. What circuit is the damage control circuit?
Q4. What person(s) authorize(s) calls passed over the
IMC?
a.
b.
c.
Q5. What is the difference between an IMC circuit
and a 21MC circuit?
Q6. The first 4 channels of WIFCOM are assigned
to—
a.
b.
c.
d.
FLAGS AND PENNANTS
Learning Objective: When you finish this chapter, you
will be able to—
Recognize the function and use of flags and
pennants.
Flags and pennants serve various functions
throughout the world. They have identified nations,
governments, rank, and ownership and have conveyed
messages for centuries. This section introduces flags
and pennants that identify persons and ships and
transmit information and orders. On special occasions,
flags are used as a decoration, such as “dress ship.”
The Navy uses the international alphabet flags;
numeral pennants and a code/answer pennant; a set of
numeral flags, special flags, and pennants; and four
substitutes, or repeaters.
Each alphabet flag has the phonetic name of the
letter it represents. A numeral flag takes the name of the
numeral it represents; numeral pennants are used only
in call signals. Special flags and pennants are used in
tactical maneuvers to direct changes in speed, position,
formation, and course; to indicate and identify units;
and for specialized purposes. Flags and pennants are
spoken and written as shown in figures 4-14 and 4-15.
4-17
Student Notes:
