What is the equipment arrangement that provides the maximum availability for reception of MSI broadcasts when using Inmarsat-C for TELEX communications?

Correct Answer: Option B — Separate EGC receiver.

Because Inmarsat-C terminals are generally single-channel, they cannot receive EGC broadcasts while actively transmitting or receiving TELEX traffic. To ensure maximum availability and continuous reception of critical Maritime Safety Information (MSI) as required by GMDSS, a separate EGC receiver is necessary to operate independently of the primary communications terminal.