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ROYAL AIR FORCE. COMMON CORE AND DEPLOYMENT SKILLS AIDE-MEMOIRE
You must assume that all radio transmissions are monitored. The key elements to remember are:
Security, Accuracy and Discipline (SAD).
Rhythm, Speed, Volume and Pitch (RSVP).
◉ Use your call-sign at the start of a transmission.
◉ Use only authorised nicknames and codewords.
◉ Answer calls promptly.
◉ Think before transmitting.
◉ Maintain constant radio watch.
◉ Keep messages brief, clear and logical.
◉ Use pro-words.
◉ Authenticate when a spoof message is suspected. DO NOT:
◉ Use individual mannerisms.
◉ Use slang or jargon.
◉ Transmit aircraft types, roles, loads, names, units or locations in clear.
◉ Swear or lose your temper.
◉ Violate radio silence (unless operationally necessary).
Hello - Used to alert the radio net.
This is - Indicates identity of calling station.
Over - End of my message, reply required.
Send - I am ready to receive your message.
Roger - Message received and understood.
Say Again - Repeat all or part of message.
Out - End of my message, no reply required.
Contact wait out - In contact with enemy, report to follow. Radio silence enforced, until Contact Report sent.
Figures - Groups of numbers sent digit by digit
I spell - Used in conjunction with the phonetic alphabet.
Grid - Used before any grid reference, whether in clear or code.
Radio check - Repeat how you receive my transmission.
OK - Communications satisfactory.
Weak - Your transmission is weak.
Nothing heard - No transmission received.
" Hello C34 this is 40 authenticate 3C over."
"C34, 35 over."
"40 correct out."
Then stroke through 35 to indicate that it has been used once and is not to be used again. Should another station request call-sign to authenticate re-using 3C, no reply should be offered and 'spoof signal precautions should be taken in accordance with local orders.