Operator report only
Towing three person tube turned boat to the left and when turning to the right to straighten out the path the wheel would not turn.  Immediately stopped and inspected rear steering assembly for blockage.  Discovered rudder/fiberglass mount up into boat and water coming in.  Immediately had my self and passenger put on life vest, had children call 911 and flagged over another boat.  Turned on bilge pump and inflated the other tube if needed for floatation.  Other boat came and assisted in pulling boat to shore line at south end of lake.
Lake Du Bay
Knowlton                      