RedactedNarrative: Vessel 1 docked and the Operator had some tangled rope in the back area of the boat by the motor.  Vessel 1 Operator was trying to resolve the rope issue as he observed Vessel 2 being operated by the docks at approximately 15 mph.  vessel 1 Operator was observing that Vessel 2 as it was heading directly at him and observed that the hair of the Vessel 2 Operator was in his face.  Vessel 1 Operator observed Vessel 2 strike the aft of the boat and the engine area causing Vessel 1 Operator to fall and hit his face on a hard surface of the vessel.  Vessel 1 Operator did receive an injury to his nose.  Vessel 2 Operator stated that he was operating when water splashed into his face and he could not see.  Vessel 2 Operator stated that he could not see as he collided into Vessel 1.