RedactedNarrative: Unit 1 pulled away from the dock for the first time with new purchase vessel. Operator said the port throttle and the starboard throttle did not respond the same. The port throttle was at a much higher RPM than the starboard. An attempt to correct direction of travel was made by steering with the rudder to port, but the current and momentum carried unit 1 starboard bow into the starboard bow of docked units 2, 3, 4 and 5(dock). Witness Jumped on board to take over command to cease further damage and docked/secured Unit 1.