Great Clip!
First off, a couple of observations: Man, those boats accelerate fast! Second, they lose a tremendous amount of speed if they try to pinch. Third, the right side of the course was heavily favored and a lot of boats sailing the middle part of the course (and coming into the mark on port tack) were pinching way too much while trying to fetch the mark and not maintaining their optimum VMG. And finally, one design racing is brutal! With all boats evenly matched in speed potential, there usually is a traffic jam at the marks.The Racing Rules of Sailing are there to protect the racers. Understand the rules and no one gets hurt and everyone has a good time. When a rule is not understood (or followed), that’s when boats collide. The rules are unambiguous, you are either in the right or in the wrong. Blame is not apportioned (albeit, there can be multiple infractions stemming from one incident).Rule 10 (boats on different tacks) applies in this incident. The port boat had the responsibility to avoid the starboard boat no matter what the stb. boat did (other than tacking, but that is a different rule). If the port boat skipper sailed better (by footing off and maintaining his optimum VMG) he probably would have avoided contact. But by pinching, he gave up a certain amount of maneuverability. If I was to hazard a guess, it would be the port boat skipper was looking at the mark and not paying attention to the multiple crossing situations he was about to encounter.The rules that don’t apply. Rule 11 (windward/leeward) doesn’t apply as the boats were on different tacks. Rule 13 (tacking too close) doesn’t apply as the stb boat already had rounded the mark and it’s sails set on the new tack (this rule generally applies to boats on the same tack when one of them suddenly tacks on top of the other to create a crossing situation). Rule 16 (maintaining a proper course) also doesn’t apply as the boats were on different tacks.The “Avoiding Contact” rule tends to get misinterpreted a lot. The rule is there so there are no intentional collisions. A boat cannot ram another while enforcing its “rights”. The proper recourse is for the boat in the right to avoid contact and then protest the offending boat. Likewise, a burdened boat cannot “play chicken” with a privileged boat. How I saw the clip, the two boats had a glancing blow, with their rigging making contact. I do not believe that the stb boat’s skipper intended to collide with the other guy and was fully expecting the port boat skipper to “do the right thing”.