Radio Telephony/ RTR (A) Overview


Radio Telephony For you,

This is my first post here, feel free to comment what you feel about it and ask anything that you want to know on this subject. When I first decided to undergo the exam for RTR (A), I realised that not much of help is available online easily. Most of the time we end up browsing 10 different sites and in the end we realise that we are still at the start line and maybe more confused as to what to do. That is when I thought of starting this blog so that the basic knowledge of what this exam i.e RTR (A), is all about should be available to everyone. Rest of course you can take classes and learn. So here it goes…This is just the start so information will keep following as and when I get suggestions and ideas from different people across the web. Anyone is free to suggest, it will not cost you a penny and maybe someone will benefit from it.

The international professional license RTR(A) or Radio Telephony Restricted (Aeronautical) required for the use of communication equipment in an aircraft is the prerequisite for issue of pilot license in many countries. In the United States this license is not required for domestic flying.

The WPC (Wireless Planning and coordination) wing of the Ministry of Communication, Government of India conducts this examination and issues the RTR(A) license in India.The guidelines of this license exam are prescribed by International Radio Regulations.
The RTR (Aeronautical) exam consists of following two parts.

• Part 1: Practical test in Regulations and Procedures (Transmission)
• Part 2: Oral Exam (VIVA) in A) Regulation and Procedure B) Radio principles and practice
Who should attend

You should be able to read and write and speak english fluently


You should have completed 12th or equivalent

Section A – Regulation and Procedure:
General and aeronautical ‘Q’ code signals and other abbreviations as contained in Annex-10 (vol. 1 & 2) of International Civil Aviation Organization.

General Radio Telephone communication procedure and radio telephone communication procedure for distress & urgency and spellings used in telephony for words and figures. Licence requirements of radio apparatus used in aircraft.
Minimum requirement of radio Equipment to be carried on aircraft as prescribed in Annex-6 of the International Civil Aviation Organization and navigation facilities available together with principal frequencies to be used for communication and navigation within India.

Meteorological codes, pre-flight briefing services and the usages.
Knowledge of Notices To Airman issued by the Civil Aviation Authority in India as applicable to the aeronautical mobile and air traffic control services.
SECTION B – Radio Principles and Practice:
Applicant will be required to have knowledge of electrical units such as volt. Ampere, ohm and watt, wave length, frequency and their relationship. Knowledge of radio frequency propagation, day and night frequencies, skip distance, fading ground shadow and its effect on communication, choice of frequencies to attain maximum efficiency in handling air-ground HF communications.
General knowledge of system employed for air ground communication including SELCAL operation, inter communication and announcing system of aircraft, elementary knowledge of radio navigation aids, operation of microphones and headphones, squelch, A. V. C volume control, tuning of transmitter, simplex and duplex operation, advantages and disadvantages of H. F. Radiotelephony communication and limitations of range due to frequency interference etc.

What is written above is the basic knowledge about this exam. I am sure a lot of people will say this we already know. But believe you me even this information is not available to most.

Signing off for now will come back again..

RTR (A), Radiotelephony

Arunaksha Nandy











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