RedactedNarrative: The Operator of Vessel 1 was attempting to dock in the transient dockage area when the Operator confused the throttles on Vessel 1 and inadvertently gave too much throttle as he backed towards the slip, stern first.  As a result, the starboard stern quarter of Vessel 1 collided with the port bow of Vessel 2 which was docked nearby.  The force of the collision pushed Vessel 2 farther into its own dock, snapping two of the dock posts at their bases.  One of the snapped dock posts then struck Vessel 3 on the port side.