Port-Starboard and a Wind ShiftWritten by Jeff Rehm
Rules Quiz - Port Starboard with a windshift
Boats S (blue, on starboard tack) and P (yellow, on port tack) are both sailing close-hauled and are converging on a beat. P will safely cross S. However, when they are less than 2 boat-lengths apart, the wind shifts to the right ten degrees. S heads up (changes her course) in response to the windshift such that P is unable to keep clear. There is minor contact with no damage or injury, and both boats protest. You are on the protest committee. How would you decide this and why?
The answer will be provided in the comments in a few days after we've had a chance to discuss. Hint - its not as clear-cut as it may seem ;).
Here we can see that without the windshift, boat P is able to cleanly cross (keep clear) of boat S
However, with the windshift occuring, the angles change and P is no longer able to keep clear.
This quiz comes from Dave Perry's 100 Best Racing Rules Quizzes (Quiz #6) Answers to Dave Perry's 100 Best Racing Rules Quizzes are based on The Racing Rules of Sailing for 2017-2020. For a comprehensive explanation of the rules, read Dave Perry's Understanding the Racing Rules of Sailing through 2020, which is available through US Sailing: 1(800) 877-2451 or ussailing.org . Permission to reprint this quiz for non-commercial use is granted by the author.
Wednesday, 21 February 2018 08:35
posted by Ron
I know nothing of rules = ( - but I suspect blue is at fault, over taking boat is to keep clear? Though he was starboard, he's now over taking and leeward. Love that you're doing these!
Sunday, 18 February 2018 16:34
posted by Roger Cochran
Rule 10 says: ON OPPOSITE TACKS
When boats are on opposite tacks, a port-tack boat shall keep clear of a starboard-tack boat.
Rule 16.1 says: When a right-of-way boat changes course, she shall give the other boat room to keep clear.
Since the boat was crossing, the starboard boat is required to keep clear and not make contact.
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