SPECIAL SERIES CRISIS COLLECTION Volume 1 UNITED STATES CRYPTOLOGIC HISTORY
Attack onon a a SigintSigint Collector,Collector, the U.S.S.U.S.S. Liberty (S-CCO)-fS-€OOr
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NATIONAL SECURITY Classifiedby byNSA/CSSM NSA/CSSM 123-2 AGENCY Review in in April April 2011
CENTRAL Declassified and approved for release by NSA on 11-08-2006 pursuant to E.O. SECURITY 12958, as amended. MDR 51712. SERVICE Contents of this publicationpublication should not be be reproduced,reproduced, oror furtherfurther disseminateddisseminated outside the U.S.U. S. IntelligenceIntelligence CommunityCommunity without thethe permissionpermission of the Director,Director, NSA/CSS. Inquiries about reproduction andand dissemination shouldshould bebe directed to the OfficeOffice of Cryptologic ArchivesArchives andand History, T54. i 'fOP SECRE'f UMBRA I
UNITED STATESSTATES CRYCRYPTOLOGIC PTOLOGIC HISTORYHISTORY
Special SeriesSeries Crisis CollectionCollection
VVolume olu►ne 11
Attack onon a SigintSigint Collector,Collector,
the U.S.S.V.S.S. LilJerty-(S=€€6TLiberty •
William D. GerhardGerhard Henry W. MillingtonMillington
NATIONAL SECURITY AGENCY/CENTRALAGENCY/CENTRAL SECURITY SERVICESERVICE 1981
NO'f ItEtEASABLE 'fO fOItEIGN Nlt'fIONltLS
'fOP SECRET UMBRA
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Contents Page ForewordForeword______ vii Authors' Note______Note ix Chapter I POLITICAL-MILITARY BACKGROUNDBACKGROUND (U) _ 1 Chapter II CONSIDERATIONS LEADINGLEADINGTO TO THETHE SHIP'S DEPLOYMENT (U) _ 5 The Requirements forfor IntelligenceIntelligence (U) _ 5 Technical Collection Factors (U) _ 6 I Its ee8) ... 6 ~o 1. 4 . (c) Fo 1. 4 . (d) U.S. InterceptIntercept of VHF/UHF CommunicationsCommunications {l,JL------(U) --- _ 10 1 I(e eeSJ ------10 Airborne CollectorsCollectors (U) - _ 11 The Decision to Deploy the Liberty (U) _ 12 Chapter III DEPLOYMENT TOTO THE MEDITERRANEAN (U) 15 U.S.S. Liberty's Modus Operandi (U) 15 Abidjanto toRota, Rota, 24-3124-31 May 1967 (U) 17 Liberty at Rota, 31 MayMay to 22 JuneJune 19671967 (U)(U)______ 17 Air Force SecuritySecurity Service'sService's TechnicalTechnical Processing Center (U)(U)______ 18 Enroute toto Operational AreaArea ThreeThree (U) 19 Directions toto Withdraw the Liberty (U) 21 OperationalArea AreaThree, Three, 88 June (U) 23 Liberty's Processing Mission (U)(U)______ 23 Chapter IV THE ATTACK (U)(U)______ 25 Reconnaissance ofof the Liberty (U) 25 General QuartersQuarters DrillDrill (U) 25 Attack Begins (U) 26 Air Attack Begins (U) 26 Torpedo-Boat AttackAttack (U) 28 Post-Attack Reconnaissance (U)(U)______ 30 Sixth Fleet Reacts (U) 31 WishingtonWashington Informed (U) 32 Israel Reports Error (U)______(U) 32 Johnson InformsInforms KosyginKosygin (U) 32 Liberly Recovers (U) 32 Liberty Recovers (U) 32 U.S. NavalNaval Attache Helicopters to the Liberty (U) 34 Israeli Helicopter Conversations (U) 34 Liberty Licks Its Wounds (U) 35 Chapter V THE ISRAELI EXPLANATION (U)______(U) 37 Chronology of ofIsraeli Israeli ActionsActions (U) 37 Israeli Prosecutor's ChargesCharges ofof NegligenceNegligence (U) 38 Explanation ReexaminedReexamined (U)______(U) 40 Chapter VI RECOVERY ANDAND INITIALINITIAL ASSESSMENTASSESSMENT (U) 43 Medical AssistanceAssistance (U)(U)------______ 43 Commander,Sixth Sixth FleetFleet Arrives (U) 43 Replacement Inquiries (U) 43
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Page Recovery ofof SensitiveSensitive Materials (U)(U) _ 44 Assistance to NSA NSA PersonnelPersonnel (e eeO) _ 45 Cleanup Continues (U) - _ Cleanup Continues (U) 45 Command Investigations InitiatedInitiated (U) ------_ 47 Preparations at MaltaMalta (U)(U) _ 47 Blalock Returns HomeHome (U) (U) _ 48 Liberty's Arrival at Malta (U)(U) -_ 48 Evacuation of Wilson Wilson (U) (U) _ 51 Clearing Damaged Areas (U) _ 51 Damage SurveySurvey atat Malta (U)(U) -- _ 52 JCS Factfact FindingFinding Team'sTeam's InterviewsInterviews (U)(U) _ 52 Accounting forfor Classified MaterialMaterial (U)(U) _ 54 Joint SurveySurvey at NorfolkNorfolk (U)(U) _ 55 Chapter VVIIII THE INCIDENTINCIDENT UNDERUNDER REVIEWREVIEW (U)(U) _ 57 The NSANSA Review Review and Reaction (U)(U) _ 57 The JCSJCS ReviewReview (U) (U) _ 58 Congressional Review (U) _ 59
Chapter VVIIIIII A FINAL LOOK (U) _ 61 Safety EstimatesEstimates forfor CollectionCollection MissionsMissions of Mobile Platforms (U)(U) _ 61 Availability of Linguists (U)(U) _ 62 Communications Problems (U)(U) _ 62 File Reduction for ExposedExposed CollectorsCollectors (U) _ 62 Unanswered Questions (U) _ Unanswered Questions (U) 63E°63EO 1.4.(c)1. 4 . (c) Denouement (U) ~~~::- EO 1.4.(d)1. 4. (d) Denouement (U) 64 E° Bibliography (U) -"';;::::...------67 Illustrations (U)
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