NOSCrptProjCOMBO_1980

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SEClff FOREWORD (U) ,;er' Project COM 80* uses coded marine animal sounds for a covert underwater communications system with ranges to SO nmi. The Project COMBO concept originated in 1959 at the Navy Electronics Laboratory. Collection and analysis of sounds suitable for ultimate use in Project COMBO began in 1965. We recorded marine animal sounds. mearntl!'d sound source levels. observed animal behavior and initiated a.:oustic analyses. In I
-SEGR!T SUMMARY (U) OBJECTIVE (U) ,JRr" Develop a covert communications system with a bioacoustical message fom1a1 using animal sounds as message elements that are recognizable with existing Oeet signal pro· cessing equipment. RESULT$ (U) I.
Page 1 and 2: Description of document: ISCAP rele
Page 3 and 4: N N ~ G:: .... ~ 0 z . DECLASSIFIED
Page 5 and 6: SECRET CThts j)aqe .. ii U:ack"S:::
Page 7: emm01:~rnH HCUl'llTY Cl..ASSIF"ICAT
Page 11 and 12: SECRET DEl'LOYl\ILNT SFCUR!TY ... J
Page 13 and 14: SECRET INTRODUCTION I U I ~ l'roj1
Page 15 and 16: -....... ·. ~fi.l.!a~·l: &~?: ..'
Page 17 and 18: SECRET I ~ Larg.l' wlrnh:s prodlll'
Page 19 and 20: ·~ r SEGREr- The blue wh.ill' moan
Page 21 and 22: .., ' SECRET .;· ' PINNIPEDS (U) (
Page 23 and 24: SECRET I •' ~ ,.,. t ·-· ....
Page 25 and 26: SECRET ~ ·• \H'nly huur~ ui'hina
Page 27 and 28: SECRET ;:: ·- ( = 0 r I 0 - c •r
Page 29 and 30: SECRET = "'O .i ;:; ::t: .,_. J. ·
Page 31 and 32: .. ,.. .. • SECRET >R'f In June .
Page 33 and 34: SECRET FREQUENCY (kHzJ ll':\CL,\SSI
Page 35 and 36: SECRET ;; ·= .. '· ~ ,, ~ :g ·~
Page 37 and 38: SECRET ;81 111e synthesis of pilot
Page 39 and 40: Syst.·m I. WQC-~ 'Low lkllllh .. S
Page 41 and 42: SECRET ·O 0- '! al r-.. .o· N - ~
Page 43 and 44: SECRET 1nid·ft\·11u
Page 45 and 46: SECRET System Depluym.:nt Fr.:qu.:n
Page 47 and 48: SECRET REFERENCES !U) I. Cunm1ings.
Page 49 and 50: SECRET 30. Sd1L1stl·r111:1n. R. J

NOSCrptProjCOMBO_1980

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