UNCLASSIFIED 



SECURITY CLASSIFICATION OF THIS PAGE fWTien Dalm Enltred) 



REPORT DOCUMENTATION PAGE 



READ INSTRUCTIONS 

 BEFORE COMPLETING FORM 



1 REPORT NUMBER 



NSWC/WOL TR 77-90 



2 GOVT ACCESSION NO 



3 RECIPIENT'S CATALOG NUMBER 



4 TITLE (and Subtitle) 



Fish Killing Potential of a Cylindrical 

 Charge Exploded Above the Water Surface 



5, TYPE OF REPORT A PERIOD COVERED 



Final 



i. PERFORMING ORG. REPORT NUMBER 



7. AUTHORfs; 



John F. Goertner 



B. CONTRACT OR GRANT NUMBERC»J 



9 PERFORMING ORGANIZATION NAME AND ADDRESS 



Naval Surface Weapons Center 



White Oak, Silver Spring, Maryland 20910 



10. PROGRAM ELEMENT. PROJECT, TASK 

 AREA a WORK UNIT NUMBERS 



63721N; S0400; S040001; 

 CR14CA501 



1- CONTROLLING OFFICE NAME AND ADDRESS 



12. REPORT DATE 



12 December 1978 



13. NUMBER O"^ OAGES 

 39 



14. MONITORING AGENCY NAME & ADDR ESSf// d/Z/erenl from Conlrolling Ollice) 



IS. SECURITY CLASS, (ol thia report) 



UNCLASSIFIED 



1S«. DECLASSIFI CATION/ DOWN GRADING 

 SCHEDULE 



16 DISTRIBUTION STATEMENT (ot this Report) 



Approved for public release, distribution unlimited, 



17. DISTRIBUTION STATEMENT (of the abslrmct entered Ir^ Block 20, II dlllerent Irom Report) 



18- SUPPLEMENTARY NOTES 



19 KEY WORDS (Continue on reverse aide If neceasmry mnd Identify by block nuiTyber) 



Explosions 



Airburst 



Underwater Explosions 



Swimbladder Fish 



Fish-kill 



Lethal Ranges 



20 ABSTRACT (Continue on reverae aide If neceaamry mnd Identify by block nurr\ber) 



Two special air-burst test geometries are compared with two 

 typical underwater explosion test geometries in order to determine 

 the relative hazard to swimbladder fish. The method consists of 

 approximate calculations for extreme values of compression and 

 extension of the fishes' gas-filled swimbladder in response to the 

 explosion pressure waves. The kill probability is then calculated 

 from the ratio of maximum to minimum radius during the oscillatory 

 response using a n experimentall v dpterminpd fnnptinn. (Cont.) 



DD 1 JAN^S 1473 EDITION OF 1 NOV 65 IS OBSOLETE 



UNCLASSIFIED 



S/N 102-014- 660 1 



SECURITY CLASSIFICATION OF THIS PAGE (When Date Snimrtd) 



