What should a pilot transmit on initial radio contact with an ATS unit?

On initial radio contact with an Air Traffic Service (ATS) unit, it is essential for a pilot to clearly identify themselves. This is done by transmitting the type of aircraft and the last four letters of the aircraft's registration in phonetic form. This practice ensures that the ATS personnel clearly understand the pilot's identity, which is critical for effective communication and safety.

Using phonetics reduces the chances of miscommunication that could occur due to similarities in callsigns or background noise. By verbalizing the aircraft registration in a standardized manner, the pilot ensures that the ATS can accurately acknowledge their presence and provide the necessary instructions or assistance. This initial transmission sets the tone for further communication and helps establish a professional and efficient exchange between the pilot and ATS.

Other options like discussing flight path, estimated arrival times, initial altitude, intended route, weather conditions, and fuel status are typically addressed at a later point, when appropriate, but are not necessary for the initial contact. The primary goal at that moment is to establish who the pilot is and to ensure the ATS can effectively manage traffic and provide relevant services.