Clark Chapin, who races at the Portage YC near Ann Arbor, Mich, wrote asking for an analysis of this incident, which he said had been puzzling several experienced sailors and a few veteran judges. Two Interlakes, 18-foot sloops, were beating in about 8 knots of wind toward a windward mark they were required to leave to port. As he began his starboard-tack rounding, Stan was about eight boatlengths ahead of Portia. Portia was closehauled on port tack on a track to pass two boatlengths to leeward of the mark. The course to the next mark was almost dead downwind. Stan bore off to round the mark between positions 1 and 3. At position 3, Portia believed she would have no trouble crossing Stan's bow and keeping clear. Then Stan, still on starboard tack, continued to bear off-between positions 3 and 4-until he was a few degrees by the lee. As Stan bore off it began to look to Portia as if she and Stan might collide, so she bore off in an effort to continue to keep clear. Portia hailed, "Hey, give me room to keep clear." Stan then headed up and defused the incident by steering a course to pass astern of Portia. Relieved, Portia returned to a closehauled course.