Which functions may the holder of a GMDSS Radio Operator License not perform on Inmarsat-C equipment?

The holder of a GMDSS Radio Operator License is authorized to perform a variety of functions related to the operation of maritime communication equipment, including Inmarsat-C. However, adjusting the azimuth and elevation values of the antenna is not one of the functions they are permitted to perform.

This restriction is in place because adjusting these parameters typically requires specialized technical knowledge and skills that go beyond basic operational training. Such adjustments can significantly affect the performance of the equipment and its ability to maintain effective communication, which is critical in maritime environments.

In contrast, selection of the Land Earth Station (LES) for routine traffic, maintaining the antenna, and performing logon and traffic management functions are considered basic operational tasks. The license holder is trained to handle these appropriately within the limitations of their certification and ensures proper communication without engaging in technical adjustments that might compromise the system's effectiveness or safety.