UNCLASSIFIED 



Security Classification 



<EY WORDS 



Aquatic Animals - Acoustic Properties 

 Deep Scattering Layer 



\. ORIGINATING ACTIVITY: Enter the name and address 

 of the contractor, subcontractor, grantee, Department of De- 

 fense activity or other organization (corporate author) issuing 



2a. REPORT SECURITY CLASSIFICATION: Enter the over- 

 all security classification of the report. Indicate whether 

 "Restricted Data" is included. Marking is to be in accord- 

 ance with appropriate security regulations. 



2b. GROUP: Automatic downgrading is specified in DoD Di- 

 rective 5200.10 and Armed Forces Industrial Manual. Enter 

 the group number. Also, when applicable, show that optional 

 markings have been used for Group 3 and Group 4 as author- 



INSTRUCTIONS 



imposed by 



complete report title 

 ;es should be unclas 

 elected without clas 

 . all capitals in pare 



ified. 



3. REPORT TITLE: Enter the 

 capital letters. Titles in all ca! 

 If a meaningful title cannot be s 

 tion, show title classification ir 

 immediately following the title. 



4. DESCRIPTIVE NOTES: If appropriate, enter the type of 

 report, e.g., interim, progress, summary, annual, or final. 



'e dates when a specific reporting period is 



5. AUTHOR(S): Enter the na 



e(s) of authors) as 

 le, first name, middl 

 h of service. The I 



shov 



absolute minir 



6. REPORT DATE: Enter the date of t 

 month, year; or month, year. If more tha 

 on the report, use date of publication. 

 la. TOTAL NUMBER OF PAGES: The 

 should follow normal pagination procedu 

 number of pages containing information. 



76. 

 re fere 





8b, 8c, & 8d. PROJECT NUMBER: Enter the appropriate 

 military department identification, such as project numbei 

 subproject number, system numbers, task number, etc. 

 9a. ORIGINATOR'S REPORT NUMBER(S): Enter the oft 

 cial report number by which the document will be identifii 

 and controlled by the originating activity. This number rr 

 be unique to this report. 



9b. OTHER REPORT NUMBER(S): If the report has bee 

 assigned any other report numbers (either by the originate 

 or by the sponsor), also enter this number(s). 

 10. 



'Qualified requeste 

 eport from DDC " 



:ign ; 



standard statements 

 copies of this 

 ;mination of this 



irt by DDC is not authorized." 

 S. Government agencies may obtain copies of 

 report directly from DDC. Other qualified DDC 



rs shall request through 



"U. S. military agencies may o! 

 report directly from DDC. Othe 

 shall request through 



i of this report is controlled. Qual- 

 shall request through 



If the report has been f> 

 vices, Department of Co 

 e this fact and enter the 



Office of Tec 

 e to the publi 



11. SUPPLEMENTARY NOTES: Use for additional 



12. SPONSORING MILITARY ACTIVITY: Enter the 

 the departmental project office or laboratory sponsori 

 trig for) the research and development. Include addre 



13. 



mary 



of the d 



. If 



so appe 

 ddition 



ttach 



ed. 



Enti 



jstract giving a bri 

 cative of the report 

 in the body of the 



though 

 al re- 



eet shall 



highly desirable that the abstract of classified re; 

 ssified. Each paragraph of the abstract shall end ' 

 ition of the military security classification of the i 

 l in the paragraph, represented as (TS), (S). (C). or 



the 



abstr; 



cataloging the repor 

 no security classific 

 mpment model desigi 

 e, geographic locatic 

 followed by an indii 

 ment of links, roles, 



as key 



optional. 



UNCLASSIFIED 



Security Classification 



