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

The correct answer focuses on maximizing the reception of Maritime Safety Information (MSI) broadcasts by utilizing a separate Enhanced Group Call (EGC) receiver. This arrangement is optimal because it allows for dedicated resources to be allocated to monitor and receive MSI broadcasts continuously without interference or resource sharing with other communication systems.

When using Inmarsat-C for TELEX communication, the integrated systems could potentially consume bandwidth and processing power, which may detract from the effectiveness and reliability of receiving crucial safety information. By having a separate EGC receiver, the station can ensure constant vigilance over MSI broadcasts, thereby enhancing safety at sea by ensuring that vital navigational alerts and safety messages are received promptly and reliably.

While integrating the EGC with existing Inmarsat-C equipment may seem efficient, it could lead to potential conflicts or limitations in performance for urgent broadcasts. Similarly, relying solely on HF SSB or automatic switching introduces complexity and might not guarantee optimal reception as it does not focus specifically on EGC functionalities. Therefore, the dedicated receiver arrangement stands out as the most effective solution for ensuring uninterrupted access to MSI broadcasts.