At what point does a right-of-way boat need to act to avoid contact? [Sailing Rules 2025-2028]

In World Sailing case 87, boats were approaching a line to start, with most boats on port tack because of the wind direction relative to the starting line. While other boats on port tack bore off to pass astern of a boat approaching the line on starboard tack, one boat on port tack did not act to keep clear and collided with the starboard boat. Were both boats penalized? Subscribe for more videos on the racing rules of sailing:    / @racingrulesgeek   Sources: The Racing Rules of Sailing for 2025-2028 https://www.sailing.org/inside-world-... World Sailing Case Book for 2025-2028: https://www.sailing.org/document/worl... Chapters: 0:00 / What was the situation in case 87? 0:35 / Which racing rules apply? 1:46 / Were both boats penalized?