RedactedNarrative: While involved in a sailing race:
   - Vessel #1 on a starboard tack (stand-on vessel in a crossing situation)
   - Vessel #2 on a port tack (give-way vessel in a crossing situation)
   - Vessel #1 tacked to starboard and Vessel #2 made contact with the stern / transom area of Vessel #1.
  Vessel #2 at fault for not taking early and substantial action to keep well clear as give-way vessel.