RedactedNarrative: Vessel was exiting Mona Lake Channel to Lake Michigan and operator realized Lake Michigan had very rough waves. Vessel 1 attempted to turn back when the motor stalled. The vessel was pushed up onto the channel rocks by the wave action of the lake. The operator attempted to push off of the rocks when a wave hit the boat and his middle finger was amputated when the hull made contact with the rocks. Once the other people where removed from the vessel, the vessel sank. No other injuries incurred.