Radio Telephony Restricted is a Communication system operated in between Air Crew Members & Pilots to Air Traffic Control and Ground Station. This communication system is very crucial for airline operators.
Note:
The RT license exam, it should be written to the Wireless Planning and Coordination(WPC) department of the Ministry of Communications. The exam is conducted 6 times in a year (i.e., two months once) and only in a particular location depending upon the month of the year starting from Feb (New Delhi), April(Mumbai), June(Chennai), August(New Delhi), Oct(Kolkatta) and December(Hyderabad).