Voice Procedure To minimise the risks associated with Interception, Analysis and Deception there are a set of rules collectively known as Voice Procedure. Interception ALL radio traffic is subject to interception by hostile forces. Analysis Intercepted radio traffic can be analysed to obtain useful information. Deception After analysis, the enemy can use our own radio nets to deceive us. This could take the form of additional traffic or could be even simpler such as the use of recordings. INTRODUCTION TO VOICE PROCEDURE Voice procedure is designed to provide us with:- Security. Accuracy. Discipline. This can be remembered by the mnemonic. S ecurity Accuracy Discipline SECURITY By listening to our radio traffic, the enemy will try to discover certain information that is important to operations. COMBAT EFFECTIVENESS Casualties. Damaged or defective equipment. Standard of Radio discipline. ORDER OF BATTLE Command structure. Radio net level, composition and function. Unit identities. INTENTIONS Tactical groupings. Movement. Operational plans. LOCATIONS Formation and unit boundaries. Areas of operation. Location of headquarters. This can be remembered by the mnemonic. Combat effectiveness. Order of battle. I ntentions. L ocations. AIDS TO SECURITY To assist us in keeping elements of COIL and other information to ourselves and not revealing them over the radio or line we have the following aids to security: CALLSIGNS A callsign is a combination of letters and figures which identify a communications facility or an organization or a individual on a Radio net. ADDRESS GROUPS A unique, daily changing group of four random letters assigned to disguise a command,formation, unit or sub-unit. eg: 11SR = Address Group SMBF NIS Net Identification Sign A twice daily - changing, random 2 letter group allotted to a radio net to provide a concealed reference to the identity of the net. CODEWORDS A single word with a pre-arranged definition used to initiate a plan or operation. Once used all of its security value is lost and therefore it must not be used again. AUTHENTICATION Authentication is a security aid designed to protect our communications against deception from fraudulent transmissions from unauthorized persons. This we will cover in a later lesson. LOW LEVEL CODES The code you will be using is called BATCO (Battle Code). Never use any unofficial codes. This can be remembered by the mnemonic. Callsigns. Address groups. Net Identification Signs-NIS. Codewords. Authentication. Low level Codes ie BATCO. ACCURACY AIDS TO ACCURACY Phonetic alphabet. Use of the proword “figures”. Spelling. PHONETIC ALPHABET ALPHA BRAVO CHARLIE DELTA ECHO FOXTROT GOLF HOTEL INDIA JULIETT KILO LIMA MIKE NOVEMBER OSCAR PAPA QUEBEC ROMEO SIERRA TANGO UNIFORM VICTOR WHISKEY X-RAY YANKEE ZULU Use of the proword “figures” During difficult conditions, or when extra care is necessary to avoid misunderstanding, figures are sent digit by digit preceded by the proword FIGURES. SPELLING Spelling is necessary when difficult Radio conditions prevent the reception of an obscure word, or of a word or group which is unpronounceable. They are preceded by the proword I SPELL. SPEECH TECHNIQUE Rhythm - Short sentences with a natural rhythm. S peed - Slightly slower than normal conversation. Volume - Normal unless on “whisper”. P itch - Slightly higher than normal. DISCIPLINE The rules for Radio Discipline (1) The following rules are mandatory on all Radio nets where every station must: ALWAYS: Use correct voice procedure. Maintain a constant listening watch. Ensure Frequency is correct. Answer all calls without delay. Listen before you transmit. Release the pressel promptly. Ensure the Radio returns to receive. The rules for Radio Discipline (2) The following rules are mandatory on all Radio nets, where every station must: NEVER: Violate Radio silence. Compromise classified Information. Make unnecessary or unduly long transmissions. Engage in operators or unofficial conversation. Identify yourself or unit by name. Speak faster than the station experiencing the worst reception can be expected to understand. Swear or lose your temper. THE RADIO NET A Radio Net is a number of radio stations grouped together on a common frequency for the sole purpose of communicating with each other. THE SIMPLE NET A Coy HQ 0 A10 1 Pl HQ B30 A20 2 Pl HQ There are three types of Net: Simple nets Combined nets Rebroadcast nets Control Station 3 Pl HQ Substations TYPES OF STATION There are two types of radio station: Control Station. Has the authority and the responsibility for controlling communications, the flow of message traffic and enforcing radio discipline. Substations. All other stations on the net are subordinate to, and must obey orders from, control and are known as substations. THE CALLSIGN A callsign is a combination of letters and figures used to identify a communications station, an organisation, or an individual on a radio net M 10A Daily Changing Callsign indicator Fixed Callsign element Establishing Comms This is carried out by the control station performing a “RADIO CHECK”. The responses to a radio check are: 1: OK comms are satisfactory. 2: DIFFICULT comms are not 100% but are workable. 3: UNWORKABLE Comms are not possible. ORDER OF ANSWERING Order of Answering Control stations in alphabetical order. All other stations in order of: C/S INDICATOR A-Y NUMERICAL FIXED C/S 10-44 SUFFIX LETTER A-D STATIONS USING EMPTY VEHICLE PREFIX Z STATIONS USING NIS STATIONS USING ADDRESS GROUPS Calls are to be answered is strict alphabetical-numerical sequence ie: STATIONS ON THE NET ORDER OF ANSWERING O G21A OA T10 HS G10 J10 R10 ZR10A ASBN O OA G10 G21A J10 R10 T10 ZR10A HS ASBN SUMMARY You should now be able to: Understand the need for ComSec. Establish communications on a simple radio net, answering in the correct order. Send simple messages accurately and clearly, using correct voice procedure.