Security MRA 23 -Callsign Allocated to UK -Associated with the RAF -Indicates Geographical Location -Serial No Issued by HQAC MRA 23 A1 M 23 A R Issued by Local Unit Callsigns
Security Given Given using the Phonetic Alphabet Main Main Station Callsign MRA MRA 99 Mike Romeo Alpha Nine-er Nine-er Main Station Callsign Mike Romeo Alpha Nine Nine Pronounced
Security When used away from Main Station Local Unit should add either: One Alpha CharacterOne Alpha Character One Alpha Character and One NumberOne Alpha Character and One Number Two Alpha CharactersTwo Alpha Characters AC and CC should be avoided Non Main Station Callsign
Security Non Base Station Callsign Examples: MRA 99 AMRA 99 A1MRA 99 AA MRA 99 BMRA 99 A2MRA 99 AB MRA 99 GMRA 99 B9MRA 99 BG MRA 99 XMRA 99 Y1MRA 99 PQ Note: The combination of AC and CC should be avoided.
Security Ease of sending Speed up sending Used when instructed Do not use: If conditions are poorIf conditions are poor Risk of duplicatingRisk of duplicating Abbreviated Callsign
Security The Sender. The Listeners. The Interceptors.
Security û Use unauthorised codenames û Use personal names or nicknames û Use slang or jargon û Transmit aircraft types, roles or weapon loads in clear speech û Transmit details of arms or ammunition, particularly their movement û Transmit unit locations in clear speech Never
Security Use your callsign at the start of a transmission Use your callsign at the start of a transmission Use only authorised appointment titles Use only authorised appointment titles Ask a station to “Authenticate” if you think it may not be a genuine one Ask a station to “Authenticate” if you think it may not be a genuine one Always
Security Authentication:- Is a way to help protect your communications How to do this is described later
Security Additional Aids to Security Codes Codes Appointment Titles Appointment Titles Veiled Speech Veiled Speech
Accuracy Before Transmitting Listen and check that you can not hear another Station Know how to use microphone Keep hands away from the front of the microphone Hold Microphone 50 mm from your mouth ready to speak across it. Do not hold the boom of a head set or desk Microphone
Accuracy Whilst Transmitting Speak clearly & distinctly Pause before and after numbers Avoid hesitation sounds such as “er” or “um” Only Press the PTT Button when ready Do not release PTT until you have finished speaking When finished check the PTT Button has released correctly
Prowords THIS ISThe callsign of the sender follows. OVERThis is the end of my present transmission, a reply is required. OUTThis is the end of my transmission. No reply is expected.
Prowords WAIT OUTYour transmission has been received, a reply will follow later.. WILCOMessage received, understood and I will comply with your instructions.. ROGERI have received your last transmission satisfactorily.
Prowords SAY AGAIN.Request for repetition of a whole, or part of a message I SPELLI shall spell the next word MESSAGEThe transmission to follow will require to be written down
Prowords FIGURESUsed before groups of numbers sent digit by digit GRID.Used before grid reference sent in clear speech. SPEAK SLOWER Transmit at a slower speed TIMEThe following group is a time group, or a date/time group
Prowords UNKNOWN STATIONUsed when calling a Station whose identity is not known CORRECT You are correct, or what you have transmitted is correct have transmitted is correct WRONGYour last transmission was incorrect. Correct version is...
Phonetics Are used: When reception is poor Signal is weakSignal is weak High Background NoiseHigh Background Noise Difficult to pronounce Operators accent
Phonetics LetterWordPronunciation MMikeMIKE R Romeo ROW ME OH VVictorVIK TAH Some examples For a full list see the separate Self Teach Presentation
Map References TTTThe Proword Grid precedes a Grid Ref Example:TQ 123 456 This should be sent as follows: GRID(short pause) Tango Quebec(short pause) Wun Too Tree(short pause) Fower Fife Six When sending Grid References they should be sent slower than normal
Time Given using 24-hour Clock Preceded by the Proword Time Example: 13 40 Hours sent as Time (short pause) Wun Tree (short pause) Fower Zero
Discipline ALWAYS ü Use correct voice operating procedure. ü Maintain a constant radio listening watch. ü Ensure correct channel/frequency is selected. ü Answer all your calls correctly. ü Think before transmitting & make sure you know your message. ü Release the PTT switch as soon as you have finished speaking & ensure the set returns to receive.
Discipline NEVER Compromise classified information by using plain language. Make unnecessary, over long or unofficial transmissions. Identify yourself, or your unit by name. Swear, or lose your temper.
Discipline NEVER Disclose Frequencies. Give telephone numbers or addresses. Personal details about yourself or others. Play Music