Unclassified 



/' DOCU^/!EMT ^ 

 LIBRARY 



Woods Hole Oceanograiynic 

 V institution 



SECURITY CLASSIFICATION OF THIS PAGE 



REPORT DOCUMENTATION PAGE 



form Approved 

 0MB No. 0704-0138 



la. REPORT SECURITY CLASSIFICATIOM 

 Unclassified 



lb RESTRICTIVE MARKINGS 



2a. SECURITY CLASSIFICATION AUTHORITY 



2b. DECLASSIFICATION /DOWNGRADING SCHEDULE 



3 DISTRIBUTION /AVAILABILITY OF REPORT 



Approved for public release; distribution 

 unlimited. 



4. PERFORMING ORGANIZATION REPORT NUMBER(S) 

 Technical Report REMR-CO-11 



5. MONITORING ORGANIZATION REPORT NUMBER(S) 



6a. NAME OF PERFORMING ORGANIZATION 

 USAEWES, Coastal Engineering 

 Research Center 



6b OFFICE SYMBOL 

 \lf applicable) 



CEWES-CD-P 



7a. NAME OF MONITORING ORGANIZATION 



6c, ADDRESS (C/fy, State, and ZIP Code) 



3909 Halls Ferry Road 

 Vlcksburg, MS 39180-6199 



7b. ADDRESS (City, State, and ZIP Code) 



8a. NAME OF FUNDING/SPONSORING 

 ORGANIZATION 



US Array Corps of Engineers 



8b. OFFICE SYMBOL 

 (If applicable) 



9. PROCUREMENT INSTRUMENT IDENTIFICATION NUMBER 



8c. ADDRESS fC/«y, State, and ZIP Code) 



Washington, DC 20314-1000 



10. SOURCE OF FUNDING NUMBERS 



1 1 TITLE (Include Security Classification) 



Underwater Inspection of Coastal Structures Using Commercially Available Sonars 



12. PERSONAL AUTHOR(S) 



Kucharski , William M. , and Clausner, James E. 



13a. TYPE OF REPORT 

 Final report 



13b. TIME COVERED 14. DATE OF REPORT {Year, Month, Day) 15. PAGE COUNT 



FROM iqas TO ]^Qg7 February 1990 ?s 



16. SUPPLEMENTARY NOTATION 



Available from National Technical Information Service, 5285 Port Royal Road, Springfield, 



VA 22161 ' 



COSATI CODES 



18 SUBJECT TERMS {Continue on reverse if necessary and identify by block number) 

 Coastal structure inspection, REMR (Repair, Evaluation, 

 Maintenance, and Rehabilitation), Side scan sonar. 

 Underwater inspection 



1 9. ABSTRACT (Continue on reverse if necessary and identify by block number) 



A general introduction to side scan sonar (SSS) and its uses in coastal engineering 

 studies is given, including some operating rules -of -thumb and suggestions based on the 

 authors' experience. There is also a section evaluating several systems currently on the 

 market . 



SSS is a valuable tool for coastal engineering, with uses likely to multiply as the 

 technology and our experience with it improve. However, quantitative applications are lim- 

 ited. Information on structure slopes, condition of individual armor units, and percent of 

 units displaced (to name a few examples) is not currently measurable in a repeatable, quan- 

 titative way. Nevertheless, the semiquantitative sonograph record can be very informative, 

 particularly to someone who has developed a familiarity with the structure or feature being 

 viewed from repeated SSS surveys. It is a safer, and in many cases, superior alternative to 

 visual inspection by divers, especially in murky water. 



20 DISTRIBUTION /AVAILABILITY OF ABSTRACT 

 El UNCLASSIFIED/UNLIMITED D SAME AS RPT 



n DTIC USERS 



21. ABSTRACT SECURITY CLASSIFICATION 

 Unclassified 



22a. NAME OF RESPONSIBLE INDIVIDUAL 

 William M. Kucharski 



22b TELEPHONE (/ndude Area Code) 22c. OFFICE SYMBOL 

 601-634-3515 I CFMFS-rn-P 



00 Form 1473, JUN 86 



Previous editions are obsolete. 



SECURITY CLASSIFICATION OF THIS PAGE 

 Unclassified 



