PREFACE 



The work described in this report was authorized by Headquarters, US 

 Army Corps of Engineers (HQUSACE) , as part of the Coastal Problem Area of the 

 Repair, Evaluation, Maintenance, and Rehabilitation (REMR) Research Program. 

 The work was carried out under Work Unit 32326, "Evaluation of Damage to 

 Underwater Portions of Coastal Structures." Mr. Gary L. Howell (CEWES-CD-P) , 

 US Army Engineer Waterways Experiment Station (WES), Prototype Measurement and 

 Analysis Branch (PMAB) , was Principal Investigator. For the REMR Program, 

 Problem Area Monitor is Mr. John H. Lockhart, Jr., HQUSACE. 



REMR Program Manager is Mr. William F. McCleese (CEWES-SC-A) , WES, 

 Structures Laboratory, and Coastal Problem Area Leader is Mr. D. D. Davidson 

 (CEWES-CW-R) , WES, Coastal Engineering Research Center (CERC) . 



This report summarizes the experience gained by the authors in the course 

 of their frequent use of sonar equipment for coastal engineering prototype 

 studies and field testing of selected commercially available sonars for the 

 purpose of assessing their usefulness in coastal applications during 1985 and 

 1987. 



The preparation of this report was accomplished at CERC under general di- 

 rection of Dr. James R. Houston, Chief, and Mr. Charles C. Calhoun, Jr., Assis- 

 tant Chief, and under direct supervision of Mr. Thomas W. Richardson, Chief, 

 Engineering Development Division, and Mr. J. Michael Hemsley, Acting Chief, 

 PMAB. The original draft of the report was written by Messrs. William M. 

 Kucharski, PMAB, and James E. Clausner, Coastal Structures and Evaluation 

 Branch. Mr. Jonathan W. Lott, PMAB, revised and edited the subsequent drafts. 

 Final editing before publication was by Ms. Gilda Miller, Visual Production 

 Center, Information Technology Laboratory, WES. 



COL Larry B. Fulton, EN, is Commander and Director of WES. Dr. Robert 

 W. Whalin is Technical Director. 



