The operator of vessel #1 was trying to Back his vessel into his slip.  When he moved the throttle to put the vessel in reverse, the vessel moved forward instead.
The operator then placed vessel #1 in neutral.  He agian tried to place the vessel in forward and agian it moved forward. It struck vessel #2  in the stern and then swung  to Port and struck vessel #3 in the bow.
Sayerville                    