BOTH INTERNATIONAL & INLAND An anchor ball need NOT be exhibited by an anchored vessel if she is __________.

Correct Answer: Option C — less than 7 meters in length, and not in or near an area where other vessels normally navigate

Rule 30(e) exempts a vessel of less than 7 meters in length from the requirement to exhibit anchor lights or day shapes (an anchor ball) when anchored, provided she is not in or near a channel, fairway, anchorage, or areas where other vessels normally navigate.