What statement is true regarding Inmarsat-C?

The statement that describes Inmarsat-C accurately highlights its operational specifics as a store-and-forward network. Inmarsat-C does not provide a direct connection between ship and shore users; instead, it utilizes a system where messages are transmitted to a satellite, which then forwards them to ground stations. This method implies that when a ship sends a message, it does not communicate directly with the recipient, but rather stores the message temporarily at the satellite before it can be forwarded to the intended destination.

This characteristic is crucial for understanding how communication operates in maritime satellite communications. With store-and-forward systems, users can send messages at their convenience, and these messages are stored for later retrieval by the intended recipient. This system helps manage bandwidth and allows communications to be established even in areas with poor communication availability.

In contrast, the other statements do not accurately describe the nature of Inmarsat-C. For instance, while there might be delays in communications or issues related to message retrieval and storage, those do not characterize the fundamental operation of Inmarsat-C as a store-and-forward network. Hence, the correct answer reflects the essential aspects of Inmarsat-C's functionality in the context of maritime communications.