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Basic Signal Communication

 

A.      Definition of Terms

         1. Signal Communication is a method or means or a combination thereof of conveying information of any kind of one person or place to another except direct communication.

         2. Means of Communication a medium by which a message is conveyed from one person to another.

         3. Agency of Communication a facility which embraces the personnel and equipment to provide signal communication by any particular means or combination thereof. COMMEL, Division Signal Battalion.

        4. Tactical Radio Sets - Is the principal means of communication in tactical units. It is use for command, fire control, exchange of information and administrative purposes between and within units. It is especially adapted to rapid changing situation such as air ground ship to shore, air to air communication. It is also essential for communication in impassable terrain or in large wire and other means is impracticable to install.

 

B.     Means of Communication

         1. Wire It is used as the principal means of communication in all military units. This means of communication embraces all equipments used for laying recovering wire, battery operated and sound-powered telephones, switch boards and teletype equipment, when their use is authorized.

         2. Radio this means of communication is the most rapid one. It is most frequently used for maintaining command, control, contact and direction in contact.

                             Advantage of Radio

                                     a. High degree of mobility and flexibility.

                                    b. It is the only adequate means of communication available in the fast moving situations such as armored attacks, amphibious operation, naval gunfire support, serial bombing and strafing mission.

         3. Messenger the use of messenger as a means of communication is preferred over the rest when maps and classified documents are to be transmitted to the other operating units.

         4. Visual Signal it is used to control the action of small units. Over the years, a visual signal has been relegated to the role of an auxiliary means of communication.

         5. Sound Signal this means of communication is used primarily to spread alarms. Normally, it is used to warn troops of an impending hostile air, mechanized, or gas attack.

 

C.     Types of Tactical Radio Sets and its Characteristics:

             1. URC 773M

                    a. Frequency Modulated (FM)

                    b. Transmission Range 10 kms (LOS)

                    c. Whip Antenna

                    d. Man Pack

                    e. Power Source 12 VDC, 24 pcs BA 30, 12V Wet Cell Battery

                    f. Press to talk (Hand set)

 

            2. PRC 77

                    a. Frequency Modulated (FM)

                    b. Transmission Range 8 kms (LOS)

                    c. Whip Antenna

                    d. Man Pack

                    e. Power Source 12 VDC, 20 pcs BA 30, 12V Wet Cell Battery

                    f. Press to talk (Hand set)

 

            3. URC 601

                    a. Handheld

                    b. Transmission Range 3 -4 kms (LOS)

                    c. Whip Antenna

                    e. Power Source 8 pcs BA 30

                    f. Press to talk (Hand set)

 

            4. URC 187

                    a. Amplitude Modulated (AM)

                    b. Transmission Range 40 kms (Sky wave propagation)

                    c. Dipole Antenna

                    d. Power Source 36 pcs BA 30, 12 24 V Wet Cell Battery

                    f. Press to talk (Hand set)

 

D.     Advantages of Tactical Radio Sets.

         1. Speed of installation - It is easy to establish than wire or other means of communication.

         2. Flexible - It is no fixed circuit is to be constructed

        3. It provides communication across terrain over which it may be impractical to install wire.

 

 E.     Disadvantage of Tactical Radio Sets

          1. Lack of Security - radio is the least secured means. It is always assumed that interception every time the transmitter is placed on operation.

          2. Subject for interception radio is less vulnerable to enemy terrorist activity than wire, however, it is subject for interference from precipitation and jamming to other station.

 

F.     Fundamental of Tactical Radio Communication

         1. Radio Net a group of several stations working together in the same frequency.

         2. Call Sign a combination of pronounceable words that identifies the facility or station.

         3. Individual Call Sign this call sign identifies a single call to any station within the net.

         4. Collective Call Sign this call sign identifies two or more stations in particular radio net but not all stations in the net.

         5. Net Call Sign this call sign identifies all radio stations operating in a particular radio net.

       6. Call a method of establishing communications whereby the station calling transmits the identity of the station called as well as his own identity.

        7. Pro words are pronounceable words which have assigned meaning to facilitate transmission by radio communication

                a. Over My transmission is ended and I expect a response from you.

                b. Roger I received your last message satisfactorily.

                c. Out My transmission is ended and I expect no response from you.

                d. Wilco I will comply to your instruction.

                e. Query Clarification

                f. Lima Charlie I received your message loud and clear.

               g. Say again I did not understand your transmission, request repeat our last transmission.

                h. Request Net With Can I talk with Pfc Tolentino or Pfc Ramos.

                i. Wait One Request that you wait for a minute, I will call the person you want to talk to.

                j. Read Back Read back the message you have copied.

               k. Radio Silence Cease transmission immediately, however, keep on listening on the same frequency.

                l. Break-break stop your conversation and allow me to this net to transmit for an urgent message.

 

G.     Phonetic Alphabet

 A Alpha             I India              Q Quebec             Y Yankee

B Bravo             J Juliet               R Romeo             Z Zulu

C Charlie           K Kilo                 S Sierra

D Delta              L Lima               T Tango

E Echo               M Mike              U Uniform

F Foxtrot          N November     V Victor

G Golf                O Oscar             W Whisky

H Hotel              P Papa                X X-ray

 

 H.     Numerical Pronunciation

 1 Wun                 6 - Six

2 Ta-o                 7 - Seven

3 Thu-ree           8 - Ate

4 Fower               9 - Niner

5 Fi-yiv                0 - Zero

 

I. Morse Code

     Alphabetical

A  . __                      I    . .                        Q    __ __ . __             Y   __ . __ __

B   __ . . .                 J    . __ __ __      R    . __ .                         Z   __ __ . .

C   __ . __ .            K   __ . __              S  . . .

D   __ . .                   L   . __ . .               T   __

E    .                           M  __ __                U  . . __

F    . . __ .                N    __ .                   V  . . . __

G   __ __ .               O   __ __ __        W  . __ __

H   . . . .                     P   . __ __ .           X   __ . . __

 

 Numerical Punctuation Mark

 

1   . __ __ __ __                             Period   . __ . __ . __

2   . . __ __ __                                 Comma  __ __ . . __ __

3   . . . __ __                                     Colon      __ __ __ . . .

4   . . . . __                                         Query      . . __ __ . .

5   . . . . .                                             Apostrophe  . __ __ __ __ .

6   __ . . . .                                         Hypen     __ . . . . __ 

7   __ __ . . .                                     Fraction Bar  __ . . __ .

8   __ __ __ . .                                 Parenthesis    __ . __ __ . __

9   __ __ __ __ .                             Quotation Mark  . __ . . __ .

0   __ __ __ __ __