Which of the following is a correctly formatted Inmarsat-C address book entry for sending communications to a fax machine on a vessel in the AOR-E?

Correct Answer: Option D — 8711504338

Ship-to-ship Inmarsat-C addressing uses the 3-digit ocean region prefix followed by the 9-digit Mobile Earth Station (MES) number. The AOR-E region is identified by the prefix 871. Combining this with the vessel's ID (1504338) is incorrect; the full 9-digit ID must be used, resulting in 8711504338.