What keyboard entry is used, after entering the shore ID, to obtain the assistance of the international telephone operator in the Inmarsat-B service?

Correct Answer: Option D — 11#

Entering 11# after the Shore I.D. triggers the international operator assistance service in the Inmarsat-B system. This specific sequence signals the Land Earth Station to connect the vessel to a human operator capable of handling international call requests, billing inquiries, or complex routing requirements beyond automated capabilities.