RedactedNarrative: Vessel 1 and Vessel 2 were under sail approximately 30 seconds before the 5-minute warning for a sailboat race.  Vessel 1 was travelling southwest on a starboard tack near the starting area for the course; Vessel 2 was traveling easterly toward Vessel 1 on a port tack.  Vessel 1 maintained course until they believed that Vessel 2 was not taking action to avoid a collision; at this time, the Operator of Vessel 1 turned off the wind port "at the last second" to try to avoid collision.  Vessel 2 also turned off the wind to starboard.  Despite these actions, the two vessels collided, with the bow and anchor of Vessel 2 striking Vessel 1 on the starboard mid-ship.  Following the collision, Vessel 2 let out their sails and the two vessels disengaged.  Both vessels then used their auxiliary engines to return to dock.  Occupant on V1 suffered a torn ligament in her knee after impacting the vessel.