Which of the following statements is true?

The correct statement emphasizes that a GMDSS Radio Operator has the option to program certain NAVTEX receivers to reject specific categories of messages, such as A, B, D, and L, if those messages are being received through another Maritime Safety Information (MSI) system. This ability is crucial for optimizing communication and ensuring that vessels are not overwhelmed with redundant safety information.

In practice, the operator can manage the flow of information by allowing different systems to handle certain alerts, which helps reduce clutter in the radio communication environment. This flexibility is particularly useful in scenarios where multiple sources provide the same safety information, allowing the operator to streamline their information intake and focus on unique messages.

This management capability reflects the efficiency and operational control that GMDSS Radio Operators have, aligning with the overarching goal of enhancing safety at sea through effective communication.