CONTENTS 



page 



PREFACE V 



INTRODUCTION 1 



RESEARCH METHODS 1 



Oceanographlc Information 1 



Biological Activity ^ 



Rock Samples 6 



Sediment Samples 6 



Test Materials 6 



RESULTS 11 



Marine Growth on STU Rigging Complex 11 



Treatment of Recovered Test Materials 11 



Marine Growth on Test Materials 13 



Metal Panels 13 



Wood Panels 13 



Tropical Wood Panels 26 



Rope Specimens 26 



Plastic Specimens 29 



Wrappings Around Plastics 34 



Electrical Insulation (0.015-Inch Thick on No. 16 Wire) 34 



Electrical Cable Insulation Over Single Conductor and 



Multiconductors 36 



Laminated Plastics 36 



Plastic Sheet 38 



Glass Microscope Slides 38 



Polyurethane Foam 41 



Polyethylene Foam 41 



Deep Ocean Borers 41 



Materials in Plastic Test Chamber 41 



FINDINGS 43 



MBL/WHOI 



D Q3D1 DD4D131 1 



