Upwind Mark Rounding Rules Quiz Answer
March 11, 2009
So my email in box has been filling up with answers and follow up questions to this morning’s rules quiz questions. If you have an idea or question, please don’t hesitate to submit it, but in the future, if you are comfortable doing so, please submit it as a comment on the blog. Your comment may help someone else better understand the situation.
So, the assignment was to describe what rules are in play at each of the positions, and determine if Red broke a rule. If she did break a rule, what rule, and how can she exonerate herself?
Let’s look at what happened. In position one and two, the two boats are on opposite tacks so according to Rule 10 (Opposite Tacks), Green – a starboard tack boat – has right of way and Red must Keep Clear. They are also in the ZONE, but according to Rule 18.1(b) Rule 18 does not apply. Now at position three, Red tacks. She is required, by Rule 13, to Keep Clear. Green is required, by Rule 14, to avoid contact. Because of where Red tacked, it is obvious that she tacked IN THE ZONE and now Rule 18.3(a) (Tacking when approaching a Mark) comes into play and says the following:
18.3 Tacking When Approaching a Mark
If two boats were approaching a mark on opposite tacks and one of them changes tack, and as a result is subject to rule 13 in the zone when the other is fetching the mark, rule 18.2 does not thereafter apply. The boat that changed tack (a) shall not cause the other boat to sail above close-hauled to avoid her or prevent the other boat from passing the mark on the required side…
Now is position 4 Red is leeward boat, and according to Rule 11, Green is required to Keep Clear. BUT! Because Red tacked in the ZONE, and therefor Rule 18.3(a) is in play, Red shall not cause Green to sail above close-hauled to avoid her or prevent Green from passing the mark on the required side…And at position 5 Red does exactly that and in the process breaks the rule.
Luffing up to make the mark, a fairly normal maneuver, she makes Green sail above close hauled, and because Red had tacked in the Zone she can’t do that. Green does what she is required to do – which is to Keep Clear, hail protest, fly a flag and sail on.
So, did Red break a rule?
YES! Rule 18.3(a)
What can Red do to exonerate herself?
After getting well clear of other boats as soon after the incident as possible, Red can take a Two-Turns Penalty by promptly making two turns in the same direction, each turn including one tack and one gybe.
If you have questions – please don’t hesitate to post them to the comments.