RedactedNarrative: Operator #1 stated to the effect: I was backing from the ramp. I thought I was going to hit the anchor of a boat in a slip, so I went forward and turned right.  There was a boat in front of me , and I went in reverse so that I didn't hit it.  I stalled one of the motors 
  with the power steering, and then I panicked.  I drifted right into the boat(vessel #2). I finally got into neutral and nosed into a slip. 
  
  Investigation revealed: Vessel #1 was backing through the marina when Operator #1 noticed a vessel behind him,subsequently he turned to starboard and throttled forward to avoid striking same.  Operator #1 then throttled into a reverse direction to avoid striking a another docked vessel ahead, when due to unsafe speed and improper operation operator #1 was unable to safely conduct the maneuver, and vessel #1 struck vessel #2's port side with it's starboard side.  As a result of the impact,  vessel #2  then impacted with the bulkhead and piling to it's starboard side.  Vessel #2 was pulled from the water by the marina for repairs.