RedactedNarrative: Watercraft #1 was tied to the dock with no occupants. Watercraft #2 was reversing from an adjacent dock. WC #2 reversed into starboard side of WC #1, cracking the fiberglass at point of impact. In addition, WC #1 was pushed into the dock causing cracking along the hull ribs. There were no injuries, and life jackets were not being used. Alcohol was not a factor.