RedactedNarrative: VESSEL 1 WAS OPERATING ON LAKE ST. CLAIR IN ST. CLAIR SHORES. VESSEL 1 STRUCK 3 LARGE WAVES, VERY ROUGH WATERS, AND BEGAN TAKING ON WATER. VESSEL 1 WAS ABLE TO MAKE IT TO SHORE WITHOUT SINKING. INSPECTION ON THE VESSEL REVEALED A CRACKED KEEL, CENTER BOTTOM OF THE VESSEL. OPERATOR OF VESSEL 1 REFUSED ANY MEDICAL TREATMENT ON SCENE. NO ALCOHOL INVOLVED.