Post on 23-Dec-2015
Introduction
• There are guidelines and standard procedures for aviation radio communication.
• It’s very important that pilots know these in order to communicate effectively around the world over aviation radio
Outline
• Number, Alphabet, and Time• Standard Phrases• Communication Priority• Radio Technique• Emergency Communication
Numbers
• Pronunciation:– 0 ZEE-RO 5 FIFE
1 WUN 6 SIX 2 TOO 7 SEV-en 3 TREE 8 AIT 4 FOW-er 9 NIN-er
– Thousand: TOU-SANDDecimal: DAY-SEE-MAL
• Examples:– 10 One Zero
19 One Niner800 Eight Zero Zero11 000 One One Thousand
Phonetic Alphabet• A Alfa N November
B Bravo O OscarC Charlie P PapaD Delta Q QuebecE Echo R RomeoF Foxtrot S SierraG Golf T TangoH Hotel U UniformI India V VictorJ Juliet W WhiskeyK Kilo X X-rayL Lima Y YankeeM Mike Z Zulu
Time
• 24 hour system used to express time:– 12:00 midnight 0000
12:30 am 00302:15 am 02155:45 am 054512:00 noon 12003:30 pm 153010:50 pm 2250
• In aviation, co-ordinated universal time (UTC, Z, or zulu) is normally used
Standard Phrases• Acknowledge Let me know you have received and
understood this message
• Affirmative Yes
• Break I hereby indicate the separation between portions of the message
• Confirm My version is… is that correct?
• Correction I have made an error, the correct version is…
• Do you read? I have called you more than once, if you are receiving me, reply
• Go ahead Proceed with your message
Standard Phrases• How do you read me? Can you hear me clearly?
• I say again I will Repeat
• Negative No
• Out My transmission is ended, I do not expect a reply from you
• Over My transmission is ended, I expect a reply from you
• Read back Repeat this message back to me after I have given “Over”
• Roger Okay, I have received your message
Standard Phrases• Say again Repeat
• Speak slower Talk more slowly
• Stand by I must pause for a few seconds
• That is correct You have the correct information
• Verify Check with the originator
• Wilco Your instructions received, understood, and will be complied with
Communication Priority
• Communication over the radio follows the following priority:– Emergency communications (Distress and Urgency)– Flight safety communications (ATC clearances, airport
advisories, position reports, flight plans etc)– Scheduled broadcasts– Unscheduled broadcasts– Other air-ground communications
Radio Technique• Call-up City tower, this is Cessna one seven two
foxtrot juliet echo sierra, (over)
• Reply Foxtrot juliet echo sierra, (this is) city tower
• Message City tower, foxtrot juliet echo sierra is transiting through the zone eastbound
en route to Oshawa
• Acknowledgement Foxtrot juliet echo sierra, city tower, cleared through the zone
• End Foxtrot juliet echo sierra, (out)
Communication Checks
• Radio operators can request radio checks to determine Readability and/or Strength
• Number Readability Strength– 1 Unreadable Bad– 2 Readable now and then Poor– 3 Readable with difficulty Fair– 4 Readable Good– 5 Perfectly Readable Excellent
Distress
• Distress call is made when an aircraft is in grave and imminent danger and requires immediate assistance
• Distress call: Mayday – Mayday – Mayday
• If in distress, the first call should be made on the air-ground frequency in use
• If no reply on current frequency, switch to distress frequency: 121.5 MHz
Urgency
• Urgency call is made to a specific station when there is a an urgent message about the safety of a ship, aircraft or person on board or within sight
• Also can be used if an aircraft is having difficulties, but immediate assistance is not required
• Urgency call: Pan Pan – Pan Pan – Pan Pan