How do you determine that your Inmarsat-C terminal has accomplished a successful login?

Correct Answer: Option D — None of the above

Inmarsat-C terminals do not utilize standardized hardware lamps like 'green synch' to confirm login status. Instead, the system relies on software-based feedback provided through the terminal's display or printer. Operators must verify the login status by checking the specific status messages generated by the terminal's internal software interface.