EXPLORER YACHT INC NOBLE HOVERCRAFT IND AMERICAN BOAT CORP HEWITT MARINE GEANGES MANUF & SALES LTD CROCKETT MCCONNELL INC JOHN EICHERT FIBRGLSNG BILL GASTON INC MAMBA MARINE INC KETRON ANNAPOLIS GROUP BRUCE MALONE BOATBUILDER GUMESON, BURTON R