RedactedNarrative: Vessel #1 was traveling south at approximately 30 mph along the west shore of Higgins Lake approximately 2000 ft east of Muskegon Ave.  Vessel ran aground on a sunken island due to the operator not knowing the lake.  Vessel began to take on water.  The out drive was damaged.  Vessel was towed into Gerrish Marina.  No injuries were reported.