RedactedNarrative: We were engaged in docking manuevers for the "Comtesse Deuxieme" to retrun to her morage at Dunatos Boat yard.  Capt was at the helm and two people were manning the lines for docking.  We were backing the boat into her slip for seaboard tiedown.  The boat is new for the owner and aside from the prepurchase sea trail this was our second day out on the water.
  
  As we pulled into the dock astern, Capt, reported trouble with the responsiveness to the engine drive.  (Note: the engine drive never failed to run.  The boat started to enter the moorage at a bad angle.  
  
  Capt was able to get boat moving foward to abort the docking, but he continued to report problems.  We ended up aster vector toward the SS Propeller at speed 1 knot.  two passengers went astern to attemtp to secure  the ship for impact.  The boat has a tender which effectively became a bumper upon impact.  One davit cable broke.  Upon impact, one passenger fell and complained of leg pain, 911 was called.
NameOfBodyOfWater: Lake Union
NearestCityTown: Seattle                       