To correctly address a SITOR message and transmit it "live" to a shore-based office the GMDSS operator would dial which sequence:

Correct Answer: Option A — DIRTLX051440344+

DIRTLX followed by the full international TELEX number is the correct syntax for establishing a direct connection. The '0' prefix is typically used for international routing, and the '+' character serves as the end-of-sequence signal to the coast station controller to initiate the dialing process.