It is possible to transmit all of the following via Inmarsat-C from a vessel except?

Correct Answer: Option C — Voice

Inmarsat-C is a data-only system and does not support voice communications. It is designed for text-based messaging, including TELEX, e-mail, and X.400 services. Because it lacks the necessary bandwidth and real-time duplex capability, voice calls cannot be placed through an Inmarsat-C terminal, unlike Inmarsat-B or Fleet systems.