Before we start, let us give you an advice.
If you plan to fly abroad or fly an airplane registered abroad, check the national requirements of the given country. Different countries have different requirements for operation of airplane on-board radio stations.
Radio telephone operator certificate is a national requirement of the Slovak Republic. Holding the certificate, pilots can operate on-board radio stations. In Slovakia, the radio telephone operator certificate is a must. It does not substitute the radio-phraseology exam nor the ICAO English exam.
Radio telephone operator certificate is regulated by a so-called Telecommunication Act. It requires all users of radio devices to be holders of license issued by the Regulatory Authority for Electronic Communications and Postal Services.
Therefore, the radio telephone operator certificate does not entitle you to perform radiotelephone procedures.
You must be a holder of radio telephone operator certificate to operate on-board communication radio stations on airplanes registered in Slovak Aircraft Register (bearing registered "OM" prefix).
With a grain of salt, we can say that the radio telephone operator certificate is needed to switch on and use on-board communication radio station on airplanes registered in Slovakia.
In the past, the exam used to be quite simple. Everyone knew what was expected. Applicants were required to learn geography, circuit diagrams, and documentation reading. Taking into consideration international requirements for air crew certification, the radio telephone operation certificate is losing its importance. Battery replacement or PCB repair is procedure requiring a certified mechanic pursuant to Part 66.
Geography and communication are required by different exams supervised by national transport authorities and examiners.
With a grain of salt, we can say that the radio telephone operator certificate is needed to switch on and use on-board communication radio station on airplanes registered in Slovakia. In our opinion, the certificate is as pointless as is the name of the authority issuing it.
It is, therefore, needed to keep in mind that in Slovakia, you must be a holder of both the aviation communication exam and the radio telephone operator certificate issued by the Regulatory Authority for Electronic Communications and Postal Services as a separate document.
Aero Language is not authorized to provide radio telephone operator testing. This testing is performed solely at the Regulatory Authority for Electronic Communications and Postal Services in Bratislava.
Requirements for radiotelephony are different in each EASA member country. For example, if you fly airplanes registered in Czech Republic (bearing registered "OM" prefix), you need a license issued by the Czech Telecommunication Office.
This license is issued only for administrative fee on the basis of validating radio telephone operator certificate from Slovakia.
In many EASA member states, the separate radiotelephony requirement simply doesn't exist or is replaced by FCL.055 aviation communication exam.