RedactedNarrative: A sailboat operated by operator attempted to maneuver into slip located at the West Access Marina at Carlyle Lake. Slip is across from slips and. He attempted an aft first docking and had to propel forward to adjust his angle of approach. As he throttled forward he had excessive speed and could not stop before reaching the moored boats in slips. He boat impacted the other sailboats by placing his bow in between the bow of the other two boats. The sailboat received three large scrapes approximately seven inches long to the portside of the hull below the gunwale. The sailboat received a single scrape approximately five feet long along the starboard side below the gunwale. The other sailboat received two scrapes in the hull area that were approximately 5 feet long on both sides. The cost estimate was given as about $1000 for each boat repair. The marina owner gave this estimate to the CPO as an approximate cost.