V1, striking vessel, was being operated by 17 year old male who was unfamiliar with this vessel.  He was trying to turn the vessel in to a slip that had a lowered floating dock in it.  Operator 1 overshot the slip, tried to reverse and then had to go forward quickly before striking other vessels. While going forward the midship port side of V1 had a glancing blow to the 2 outboard motors of V2, the struck vessel that was on a floating lift dock that was not occupied.  The port engine skeg of V2 was bent and blue paint transfer were on the 3 propeller blades and hub area.  The starboard engine only had blue paint transfer on the tip of the skeg and the propeller blades.
KEY LARGO