RedactedNarrative: Vessel #1(21' open motorboat) was traveling North headed toward the north dock of Grass Island Town Marina. While approaching the slip, the Operator over shot his slip and attempted to adjust his position. As the bow turned and started to head south, the bow rode up onto and over two boats docked along side Vessel #1's slip. Vessel #1 continued turning and headed toward the seawall alongside the western shoreline and the starboard side rear quarter struck the seawall. It took the Operator of Vessel #1 three attempts and was finally able to dock his boat. No occupants onboard the other two vessels. No injuries reported.