RedactedNarrative: On 4/19/16 around 1800 hrs., (unit #1) was docking unit #1 at Wacca Wache Marina when he collided starboard to starboard with a moored vessel (unit #2).  Operator1 said that his motor was at a high idle and he couldn't put it in reverse quick enough to avoid collision.  Subject was on unit #2 when the collision occurred and confirmed that unit #1 was at a high idle when approaching.  The collision left a 6 to 8 inch gouge in the starboard hull of unit #2 and the damage to unit #1 was minimal.  Operator1 was cited for negligent operation.