Throughout the incident Andy is on port tack and Becky on starboard. Normally the defined terms clear ahead, clear astern, and overlap do not apply to boats on opposite tacks. However, since 2009, these terms do apply to boats on opposite tacks that “are sailing more than ninety degrees from the true wind” (see the definition Clear Astern and Clear Ahead; Overlap). Therefore, at all times Andy is clear ahead, Becky is clear astern, and the boats are not overlapped. So, you might well ask, “Which boat has right of way? Becky as the starboard-tack boat or Andy as the boat clear ahead?” The answer requires you to pay attention to the introductory “when” phrases in Rules 10 and 12. Rule 10 does apply because the boats are on opposite tacks. Rule 12 does not apply because, even though Andy is clear ahead and the boats are not overlapped, they are not on the same tack. Therefore, Becky has right of way, and she retains it throughout the incident.