What additional equipment provides the maximum availability for receiving SafetyNETTM broadcasts when the associated Inmarsat-C is being used for TELEX communications?

Correct Answer: Option B — A separate EGC receiver.

Inmarsat-C terminals are typically single-channel devices. When the terminal is actively engaged in TELEX or data transmission, it cannot simultaneously monitor the EGC channel for MSI. A separate, dedicated EGC receiver ensures continuous, uninterrupted reception of vital safety broadcasts, maintaining full compliance with GMDSS watchkeeping requirements at all times.