Which of the following is a correctly formatted address for sending TELEX messages from an Inmarsat-C terminal to an Inmarsat-C vessel in the AOR-W?

The selection of the correctly formatted address for sending TELEX messages from an Inmarsat-C terminal to an Inmarsat-C vessel in the AOR-W is rooted in understanding the structure of these addresses. An Inmarsat-C address consists of two parts: the numeric identifier of the receiving vessel and possibly a secondary address.

In the correct choice, the address "584366719020" indicates a registered vessel in the AOR-W covering the geographical area of interest for such communications. The prefix "584" is assigned to a specific group of vessels operating in this region, making it clear that this address is valid within the designated area of responsibility. Additionally, the second address "584436671929" follows the same structural guidelines, further confirming its affiliation and functionality.

The format is critical because misaddressing can lead to communication failures or messages being sent to unintended recipients. Inmarsat-C addresses must adhere strictly to the prescribed numeral format and operational zone assignments to ensure effective communication, particularly in maritime contexts where accurate communication is vital for safety and operational efficiency.

In contrast, the other answer choices do not contain the proper combinations or prefixes for AOR-W communications. Therefore, selecting the correctly formatted address is instrumental for the successful transmission of TELEX messages