What is the correct Inmarsat-C address format for sending TELEX to a vessel in the IOR?

The correct Inmarsat-C address format for sending TELEX to a vessel in the Indian Ocean Region (IOR) is characterized by specific numbering conventions. For the IOR, the format generally consists of a four-digit country code followed by a six-digit vessel number. The prefix identifies the specific region of operation of the satellite network.

In this situation, the address B (583446976519) adheres to the correct format, where the initial digits 583 represent the IOR and are in accordance with the Inmarsat-C address allocation for that region. The remainder of the address, 446976519, comprises the specific vessel identifier needed to route the message correctly.

Having a thorough understanding of Inmarsat-C address formats is crucial, especially since errors in addressing can lead to misrouted messages. Familiarity with these code structures will enhance your ability to communicate efficiently with vessels at sea.