Which statement is true regarding Distress communications under GMDSS?

The statement regarding the RCC controlling a search and rescue operation and coordinating Distress traffic is correct. Under the Global Maritime Distress and Safety System (GMDSS), the Rescue Coordination Center (RCC) plays a crucial role in managing search and rescue operations. The RCC is responsible for coordinating the efforts of various agencies and vessels involved in responding to a distress situation at sea. This includes evaluating the distress signals received, organizing the response operations, and ensuring effective communication among all parties involved in the rescue effort.

The role of the RCC is critical because it is the centralized authority that oversees the entire coordination process, ensuring that resources are allocated efficiently, and that those in distress receive assistance as quickly as possible. This process is vital for the safety of those in peril at sea.

In contrast, SITOR (Simplex Telex Over Radio) modes and their usefulness regarding distress communications are less relevant in this context, as is the notion of appointing another station for distress traffic coordination, which is typically not allowed under GMDSS protocols. Initial distress communications generally occur using standard procedures that are recognized internationally, but the specifics like ARQ mode and BFEC mode do not hold the same significance in the broader context of distress traffic coordination conducted by the RCC.