Operator/injured radioed in for help to DCR (Department of Conservation and Recreation) that his boat was disabled and that his steering went.  Wind was brisk and the waves were coming into the stern of the boat.  Vessel started to flood and radioed again that the situation was getting worse.  A rescue boat arrived on scene but the wake of that vessel caused him to fall overboard into the reservoir.  His grandson was on the boat and managed to stay aboard.  Neither occupants were wearing their pfd's.  The grandfather held onto the gunwale of his boat while another rescue boat arrived pulling him into their vessel and taking them to shore where an ambulance was waiting to bring the injured to the hospital.  The grandson was fine and did not suffer any injuries.  
Belchertown