BOTH INTERNATIONAL & INLAND A vessel may exhibit lights other than those prescribed by the Rules as long as the additional lights __________.

Correct Answer: Option C — do not interfere with the keeping of a proper look-out

COLREG Rule 27(b) permits additional lights provided they cannot be mistaken for prescribed lights, do not impair visibility or distinctive character, and do not interfere with the continuous maintenance of a proper look-out as required by Rule 5.