Unclassified 



Security Classification 



DOCUMENT CONTROL DATA - R&D 



(Security claasification ol title, body ot abstract and intiexinjC anr^otation mu b ( fae entered when the overall report is classthed) 



1 ORIGINATIN G ACTIVITY (Corporate author) 



U. S. Naval Civil Engineering Laboratory 

 Port Hueneme, California 93041 



2s REPORT SECURI TY CLASSIFICATION 



Unclassified 



2b GROUP 



3. DEPORT TITLE 



Deep-Ocean Biodeteriorotion of Materials — Part II. Six Months at 2,340 Feet 



4 DESCRIPTIVE NOTES (Type of report and inclusive dates) 



Series (Part II) December 1964-Aprii 1965 



5 AUTHORfSJ (Last narr>e. first name, initial) 



Muraoka, James S. 



6 REPO RT DATE 



August 1965 



7a. TOTAL NO. OF PAGES 7b. NO OF REFS 



53 8 



8a CONTRACT OR GRANT NO, 



b. PROJECTNo. Y-ROll-01-01-042 



d. 



9s. ORIGINATOR'S REPORT NUMBERfS; 



TR-393 



9b, OTHER REPORT NO(S) (A ny othor numbers that msy be Bs signed 

 this report) 



10. AVAILABILITY/LIMITATION NOTICES 



Copies available at CFSTI $3.00. Release to the Clearinghouse is authorized. 

 Qualified requesters may obtain copies of this report from DDC, 



n SUPPLEMENTARY NOTES 



12 SPONSORING MILITARY ACTIVITY 



BUDOCKS 



13. ABSTRACT 



This is Part 1 1 of a series of reports on the biological deterioration of materials in the 

 deep ocean. It covers the data obtained after exposing 2,385 specimens of 603 different 

 materials for 6 months (197 days) on the Pacific Ocean floor at a depth of 2,340 feet (Test 

 Site II). The materials were attached to a Submersible Test Unit (STU). The STU was retrieved 

 in December 1964 and returned to the Laboratory for test and analysis. 



There were marine fouling organisms attached to the plastic ropes, aluminum buoys, 

 polyethylene-jacketed wire rope, nickel-plated shackles, and on some metal test specimens. 

 Most of the plastic and all of the rope materials were covered with bacterial slime growth. 

 Wood panels, plastics, and Manila rope were attacked by marine borers. Cotton and Manila 

 rope specimens and jute-fiber burlap wrappings were severely deteriorated by bacterial action. 

 Metal, glass, natural and butyl rubber, and some plastics with a smoo'h and extra hard surface 

 were not affected. 



The biological effects on materials recovered from Test Site II are briefly compared with 

 materials recovered from Test Site 1. 



DD 



L1473 



0101-807-6800 



Unclassified 



Security Classification 



