Vessel 1 was in operation when the engine stalled.  The Operator and one Occupant on board lifted the hatch to the engine compartment and found water filling the engine compartment.  At this time the Operator realized that he had forgotten to insert the drain plug into Vessel 1.  The Operator of Vessel 1 then turned on the bilge pump, then entered the water in an attempt to install the drain plug.  On the first try, the Operator was able to insert the drain plug approximately three-quarters of the way.  When the Operator resurfaced Vessel 1 had begun to drift away from his location.  The Operator of Vessel 1 then made an attempt to swim toward Vessel 1, but was unsuccessful in reaching Vessel 1.  The Operator then went under the surface of the water and did not resurface.
Lakeview