Unit 1 was in the process of docking at Wacca Wachee Dry Stack.  Unit 2 was docked and unattended.  

Unit 1 was in reverse and became concerned about running into a log in the water, engaging a forward throttle more than necessary and striking Unit 2 on the port side of the bow.  Resulting in fiberglass damage and minor scrapes, no injuries occurred.
ICW-Waccamaw