Which of the following is a correctly formatted Inmarsat-C address book entry for sending TELEX communications to a vessel in the AOR-E?
Official USCG Answer & Rule Citation
Correct Answer: Option C — 5811509952
The 58-series prefix is a standard format for Inmarsat-C TELEX addressing. In this context, 5811509952 correctly identifies the destination within the AOR-E region. Unlike voice services, Inmarsat-C TELEX addressing typically omits the plus sign, relying on the network's internal routing tables to deliver the message to the terminal.
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