antarespub船舶碰撞事故调查报告

ReportoftheChiefInspectorofMarineAccidentsintothecollisionbetweentheFishingVesselANTARESandHMSTRENCHANTwiththelossoffourliveson22November1990MarineAccidentInvestigationBranch5/7BrunswickPlaceSOUTHAMPTONLONDON:HMSOHantsSO12ANCrowncopyright1992ApplicationsforreproductionshouldhemadetoHMSOFirstpublishedI992ISBU011551128xMarineAccidentInvestigationBranchDepartmentofTransport5/7BrunswickPlaceSouthamptonHantsSO12AN15April1992TheRightHonourableJohnMacGregorOBEMPSecretaryofStateforTransportSirInpursuanceofRegulation9oftheMerchantShipping(AccidentInvestigation)Regulations1989,IsubmitmyReportfollowingtheInspector’sInquiryintothecollisionbetweenthefishingvesselANTARESandthesubmarineHMSTRENCHANT,withthelossoffourliveson22November1990.Iwishtoplaceonrecordappreciationfortheco-operationwhichwasextendedtotheInspectorswhocarriedouttheInquiry,bythepartiesconcerned.Iam,Sir,YourobedientservantCaptainPBMarriottChiefInspectorofMarineAccidentsSection1PARTISection2Section3Section4PARTIISection5Section6Section7PARTIIISection8Section9PARTNSection10Section11Section12PARTVSection13Section14Figure1Figure2Figure3Figure4CONTENTSSummaryFACTUALACCOUNTParticularsofFVANTARESandCrewParticularsofHMSTRENCHANTandCrewNarrativeEMERGENCYACTIONANDSALVAGESearchOperationSalvageOperationCommentsonSearchOperationCONSIDERATIONOFPOSSIBLEFACTORSGeneralReconstructionofEventsFURTHERCOMMENTANDDISCUSSIONEventsaftertheAccidentPreviousIncidentsResponsibilityCONCLUSIONFindingsRecommendationsFVANTARESTypicalPelagicNetATrafalgarClassSubmarineMAlBReconstructionofAccidentPage1151721222427293032351.SUMMARYThepelagictrawler,ANTARESleftherhomeportofCarradaleon19November1990tofishinButeSound,northeastoftheIsleofArran,withacrewoffour.AtthesametimetheTrafalgar-classsubmarine,HMSTRENCHANT,wasoperatingintheClydeexercisearea.ShewasactingasatrainingvesselforofficersonthesubmarinecommandcourseandthecomplementincludedtheCommandingOfficerofthecourseandfourstudentofficers.Thesubmarinewastakingpartinaseriesofexercisesforthefinalseaphaseofthecourse.TheprocedureforeachexerciseserieswasthatconductofTRENCHANTwaspassedbyherCaptaintotheCourseCommanderwhointurngavechargeofthesubmarinetothestudenttobeassessed.Thestudent,designatedDutyCaptain,thencarriedoutallthefunctionsofcommandwhilebeingobservedbytheCourseCommander.On22Novembershortlyafter0200hrsTRENCHANTwasinButeSound,submergedatadepthof60metresandsteeringacourseofnorthwestataboutsixknots.AnexerciseserieshadjustbeencompletedandtheDutyCaptainwaspreparingtohandovertothenextstudent,whowaswithhiminthecontrolroom.TheCaptainandCourseCommanderwereinthewardroom,discussingtheDutyCaptain'sperformance.TRENCHANTwasdetectingsurfacevesselsbymeansofherpassivesonar.At0217hrsTRENCHANThadaclosesonarcontacttostarboardandturnedtoporttoavoidit.Bangingnoiseswerethenheardinthesubmarineanditwasassumedbythoseinthecontrolroomthatafishingtrawlhadbeensnagged.Onregainingperiscopedepth,twofishingvesselswereseen,apparentlyengagedinnormalfishing.TRENCHANTsurfacedatabout0300hrsandatrawlwirewasdiscoveredfouledonthesubmarinecasing.Attemptsbythesubmarinetocontactthetwofishingvesselsbyradiowereunsuccessful.Sinceeverythingonthesurfaceappearednormal,TRENCHANTreportedtheincidenttoFaslanebaseandcontinuedwithherexercises.LaterinthemorningitwasreportedthatANTARESwasmissingandafullscalesearchoperation,coordinatedbyClydeCoastguard,wasmounted.ThewreckofANTARESwaslocatedontheseabedintheearlyafternoon,thepositionwaswherethecollisionwiththetrawlhadoccurred.Thewreckwassalvagedon10December.ItwasfoundthatthestarboardtrawlwarphadpartedandthebrokenendmatchedthesectionofwirefoundonTRENCHANT’scasing.ThebodiesofthefourcrewofANTAREShavebeenrecovered.ThemainfindingsoftheinvestigationarethattheaccidentwascausedbyapartialbreakdowninboththestructureandthestandardsofwatchkeepingonboardTRENCHANT,followingthecompletionofacommandcourseexercise.AlsothestowagepositionandsecuringarrangementsoftheinflatableliferaftonANTARESweredeficient,suchthatitfailedtofloatfreeandinflatewhenthevesselsank.Further,thedelayofovereighthourspriortothemountingofasearchoperationwasduetoanincorrectreportfromTRENCHANT,whichstatedthatalthoughatrawlhadbeensnagged,thefishingvesselinvolvedwassafe.PART1FACTUALACCOUNT2.PARTICULARSOFFVANTARESANDCREW2.1PortofRegistryFishingNumberRegisteredLengthOverallLengthMouldedLengthMouldedBreadthBuiltEngineSpeedCampbeltownCN12316.07metres(52.75feet)'17.37metres(57.00feet)'5.64metres(18.50feet)2.76metres(9.00feet)1965byMessrsForbes,SandhavenCaterpillar,type3306,250bhpat2000rpm8knots2.2Navigation,CommunicationsandFishingEquipmentSearbyMagneticCompassKelvinHughesNavstarNavigatorDolphinTrackPlotterFurunoRadarType8030DNavigationlightsappropriateforavesselofhertypeandlengthUnidenVHFScannerFurunoRadioTypeFM2510SailorVHFRadioTypeRT144DSailorMFRadioTypeT126/R105SimradRW2182WatchkeeperCellnetTelephone2NetRecorderTypeCN-8FurunoEchosounderTypeFCV201andFurunoSonarTypeCH-142.3LifesavingAppliancesBeaufort6maninflatableliferaft-lastservicedApril1990.LocalEmergencyPositionIndicatingRadioBeacon(EPIRB)packedintolife