Radiotelephony : General ProceduresRadiotelephony provides the means by which pilots and ground personnel communicate with each other. Used properly, the information and instructions transmitted are of vital importance in assisting in the safe and expeditious operation of aircraft. However, the use of non-standard procedures and phraseology can cause misunderstanding. Incidents and accidents have occurred in which a contributing factor has been the misunderstanding caused by the use of non-standard phraseology. The importance of using correct and precise standard phraseology cannot be over-emphasised.
Radiotelephony : Transmitting Technique Before transmitting check that the receiver volume is set at the optimum level and listen out on the frequency to be used to ensure that there will be no interference with a transmission from another station.Be familiar with microphone operating techniques and do not turn your head away from it whilst talking or vary the distance between it and your mouth. Severe distortion of speech may arise from:i) talking too close to the microphoneii) touching the microphone with the lipsiii) holding the microphone or boom
Radiotelephony : Transmitting Technique Use a normal conversation toneEnunciate each word clearly and distinctlyMaintain an even rate of speech not exceeding 100 words per minute. When it is known that elements of the message will be written down by the recipients, speak at a slightly slower rateMaintain the speaking volume at a constant level.A slight pause before and after numbers will assist in making them easier to understandAvoid using hesitation sounds such as ‘er’.Suspend speech temporarily if it becomes necessary to turn head away from Microphone
Radiotelephony : Transmitting Technique Depress the transmit switch fully before speaking and do not release it until the message is complete. This will ensure that the entire message is transmitted. However, do not depress transmit switch until ready to speak.Be aware that the mother tongue of the person receiving the message may not be English. Therefore, speak clearly and use standard radiotelephony (RTF) words and phrases wherever possible.
Radiotelephony : Transmitting Technique One of the most irritating and potentially dangerous situations in radiotelephony is a ‘stuck’ microphone button. Operators should always ensure that the button is released after a transmission and the microphone placed in an appropriate place that will ensure that it will not inadvertently be switched on.After a call has been made, a period of at least 10 seconds should elapse before a second call is made. This should eliminate unnecessary transmissions while the receiving station is getting ready to reply to the initial call.
Radiotelephony : Transmission of Letters Letter Word Appropriate pronunciationA Alpha AL FAHB Bravo BRAH VOHC Charlie CHAR LEED Delta DELL TAHE Echo ECK OHF Foxtrot FOKS TROTG Golf GOLFH Hotel HOH TELLI India IN DEE AHJ Juliett JEW LEE ETTK Kilo KEY LOHL Lima LEE MAH