RedactedNarrative: Operator states he was underway in heavy winds and seas when his vessel began to take on water over the bow.  The passengers onboard started to bailout water with buckets to no avail.  The engine stalled and the boat turned beam side to the waves.  More water came over the starboard side and the vessel capsized.  Only 3 out of the 5 individuals on board survived.  Two were able to swim ashore.  A third was rescued clinging to the overturned boat.