SIST EN 301 025-3:2001

• Abstract:

  Is intended to become a harmonised standard, the reference of which is intended for publication in the Official Journal of the European Communities referencing the Directive 1999/5/EC. Refers to requirements from EN 301 025.

• Status: Published
• Publication Date: 30-Nov-2001
• ICS: 33.060.99 - Other equipment for radiocommunications
• ICS: 33.100.01 - Electromagnetic compatibility in general
• Technical Committee: RES - Radio equipment and systems
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Dec-2001
• Due Date: 01-Dec-2001
• Completion Date: 01-Dec-2001
• Mandate: M/284
• Ref Project: ETSI EN 301 025-3 V1.1.1 (2001-05) - Electromagnetic compatibility and Radio spectrum Matters (ERM); VHF radiotelephone equipment for general communications and associated equipment for Class D Digital Selective Calling (DSC); Part 3: Harmonized EN under article 3.3 (e) of the R&TTE Directive

• Official Journal Project Relation: SIST EN 301 025-3 V1.2.1:2005 - Electromagnetic compatibility and Radio spectrum Matters (ERM); VHF radiotelephone equipment for general communications and associated equipment for Class D Digital Selective Calling (DSC); Part 3: Harmonized EN under article 3.3 (e) of the R&TTE Directive
• Effective Date: 01-Dec-2009

Overview

SIST EN 301 025-3:2001 is a harmonized European standard developed by the Slovenian Institute for Standardization (SIST) in collaboration with ETSI, specifically addressing Electromagnetic Compatibility (EMC) and Radio Spectrum Matters (ERM) for VHF radiotelephone equipment used in general communications. It also governs equipment for Class D Digital Selective Calling (DSC), falling under the scope of Article 3.3(e) of the R&TTE Directive (1999/5/EC). This standard is part three of a series, ensuring that VHF maritime radio equipment supports key safety features, including access to emergency services, compliant with EU harmonization requirements.

Key Topics

• Electromagnetic Compatibility (EMC): Criteria ensuring that VHF radiotelephone and DSC equipment do not cause or suffer from electromagnetic interference, crucial for reliable marine communications.
• Radio Spectrum Use: Guidelines for operation within the 156 MHz to 174 MHz maritime frequency band, ensuring efficient and interference-free radio resource utilization.
• Technical, Operational, and Environmental Requirements: The standard outlines performance, construction, and operational criteria for VHF devices, such as:
  • Minimum required components (transceivers, receivers, DSC encoders/decoders)
  • Support for distress, urgency, safety, and routine calling
  • Environmental testing (including temperature and vibration)
  • Clear requirements for controls, displays, and alarms related to maritime safety
• Directive Compliance: Confirms that equipment meets the essential requirements of the R&TTE Directive, ensuring accessibility to emergency services and safety for users and vessels.

Applications

SIST EN 301 025-3:2001 is essential for stakeholders involved in maritime communications technology, including:

• Manufacturers: Ensures new VHF radiotelephone and Class D DSC equipment meets EU market requirements. Compliance streamlines device approval and market access.
• Vessel Operators and Shipowners: Guarantees that onboard communications equipment reliably supports essential safety functions, particularly emergency and distress calling, vital for IMO and GMDSS compliance where applicable.
• Regulatory Authorities and Test Laboratories: Provides the basis for evaluating equipment conformity, supporting standardized testing procedures across Europe.
• Maritime Safety Services: Standardizes interoperability, enabling coordinated response and supporting international maritime safety mandates.

Typical scenarios where this standard is applied include:

• Fitting new or replacement VHF communication equipment on vessels of all types
• Shipboard safety inspections for compliance with EU and international maritime regulations
• Product development cycles for marine radio communications equipment

Related Standards

Several related standards and references complement SIST EN 301 025-3:2001 for a comprehensive maritime radio compliance framework:

• EN 301 025-1: Technical characteristics and methods of measurement for VHF radiotelephone and DSC equipment
• EN 301 025-2: Requirements under Article 3.2 of the R&TTE Directive, focusing on radio spectrum usage
• Directive 1999/5/EC (R&TTE Directive): Essential European directive for radio and telecom terminal equipment
• Council Directive 89/336/EEC: Covering general electromagnetic compatibility requirements
• ITU-R Recommendations (e.g., M.493-9): Internationally recognized procedures for DSC in the maritime mobile service
• IEC 1162-1: Standards for maritime navigation and radio communication equipment interfaces

For a full list and latest updates, visit the European Commission’s New Approach website or the ETSI standards portal.

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Keywords: VHF radiotelephone, digital selective calling (DSC), electromagnetic compatibility, maritime communications standard, R&TTE Directive, marine radio equipment, harmonized European standard.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.SULSDGDMRþDDUPRQL]LUDQLElectromagnetic compatibility and Radio spectrum Matters (ERM); VHF radiotelephone equipment for general communications and associated equipment for Class D Digital Selective Calling (DSC); Part 3: Harmonized EN under article 3.3 (e) of the R&TTE Directive33.100.01Elektromagnetna združljivost na splošnoElectromagnetic compatibility in general33.060.99Druga oprema za radijske komunikacijeOther equipment for radiocommunicationsICS:Ta slovenski standard je istoveten z:EN 301 025-3 Version 1.1.1SIST EN 301 025-3:2001en01-december-2001SIST EN 301 025-3:2001SLOVENSKI
STANDARD
ETSIEN301025-3V1.1.1(2001-05)CandidateHarmonizedEuropeanStandard(Telecommunicationsseries)ElectromagneticcompatibilityandRadiospectrumMatters(ERM);VHFradiotelephoneequipmentforgeneralcommunicationsandassociatedequipmentforClass"D"DigitalSelectiveCalling(DSC);Part3:HarmonizedENunderarticle3.3(e)oftheR&TTEDirectiveSIST EN 301 025-3:2001

ETSIETSIEN301025-3V1.1.1(2001-05)2ReferenceREN/ERM-RP01-039-3Keywordsmaritime,radio,regulation,traffic,VHFETSI650RoutedesLuciolesF-06921SophiaAntipolisCedex-FRANCETel.:[phone]Fax:[phone]SiretN°34862356200017-NAF742CAssociationàbutnonlucratifenregistréeàlaSous-PréfecturedeGrasse(06)N°7803/88ImportantnoticeIndividualcopiesofthepresentdocumentcanbedownloadedfrom:http://www.etsi.orgThepresentdocumentmaybemadeavailableinmorethanoneelectronicversionorinprint.Inanycaseofexistingorperceiveddifferenceincontentsbetweensuchversions,thereferenceversionisthePortableDocumentFormat(PDF).Incaseofdispute,thereferenceshallbetheprintingonETSIprintersofthePDFversionkeptonaspecificnetworkdrivewithinETSISecretariat.Usersofthepresentdocumentshouldbeawarethatthedocumentmaybesubjecttorevisionorchangeofstatus.InformationonthecurrentstatusofthisandotherETSIdocumentsisavailableathttp://www.etsi.org/tb/status/Ifyoufinderrorsinthepresentdocument,sendyourcommentto:[e-mail]opartmaybereproducedexceptasauthorizedbywrittenpermission.Thecopyrightandtheforegoingrestrictionextendtoreproductioninallmedia.©EuropeanTelecommunicationsStandardsInstitute2001.Allrightsreserved.SIST EN 301 025-3:2001

ETSIETSIEN301025-3V1.1.1(2001-05)3ContentsIntellectualPropertyRights.7Foreword.7Introduction.81Scope.102References.103Definitionsandabbreviations.113.1Definitions.113.2Abbreviations.114Technicalrequirementsspecifications.114.1Environmentalprofile.114.2General,operationalandtechnicalrequirements.124.2.1Generalandoperationalrequirements.124.2.1.1Composition.124.2.1.2Construction.124.2.1.3Controlsandindicators.134.2.1.4FacilitiesforcodinganddecodingofDSC.144.2.1.4.1Callfunctions.144.2.1.4.2MANUALcalls.144.2.1.4.3Distresscalls.144.2.1.4.4ALLSHIPScalls.144.2.1.4.5Incomingcalls.154.2.1.5DSCdisplay.154.2.1.6Handsetandloudspeaker.154.2.1.7Safetyprecautions.154.2.1.8Labelling.164.2.1.9Warmup.164.2.2Technicalrequirements.164.2.2.1Switchingtime.164.2.2.2Classofemissionandmodulationcharacteristics.164.2.2.3FacilitiesforDSCtransmissionandreception.164.2.2.3.1General.164.2.2.3.2Decoding.164.2.2.3.3Freechanneltransmission.164.2.2.3.4Automaticacknowledgement.174.2.2.3.5Automaticre-transmissionofdistresscalls.174.2.2.4Shipsidentity-MMSIandGroupMMSI.174.2.2.5Entryofpositioninformation.174.2.2.6Alarmcircuits.174.2.2.6.1Distressandurgency.174.2.2.6.2Othercategories.174.2.2.6.3Acousticalarms.174.2.2.6.4Cancellationofalarms.184.2.2.7Facilitiesforautomaticidentification.184.2.2.8Multiplewatchfacilities.184.2.2.8.1General.184.2.2.8.2Scanningprovisions.184.2.2.8.3Scanningcharacteristics.194.3Environmentalrequirements.194.3.1Vibrationtest.194.3.1.1Definition.194.3.1.2Requirement.194.3.1.3Conformance.194.3.2Temperaturetests.19SIST EN 301 025-3:2001

ETSIETSIEN301025-3V1.1.1(2001-05)44.3.2.1Definition.194.3.2.2Dryheat.194.3.2.2.1Definition.194.3.2.2.2Requirement.194.3.2.2.3Conformance.194.3.2.3Dampheat.204.3.2.3.1Definition.204.3.2.3.2Requirement.204.3.2.3.3Conformance.204.3.2.4Lowtemperature.204.3.2.4.1Definition.204.3.2.4.2Requirement.204.3.2.4.3Conformance.204.4Conformancerequirements.204.4.1Sensitivityofthemodulator,includingmicrophone.204.4.1.1Definition.204.4.1.2Limit.204.4.1.3Conformance.204.4.2Audiofrequencyresponse.204.4.2.1Definition.204.4.2.2Limit.214.4.2.3Conformance.214.4.3Audiofrequencyharmonicdistortionoftheemission.214.4.3.1Definition.214.4.3.2Limit.214.4.3.3Conformance.214.4.4Residualmodulationofthetransmitter.224.4.4.1Definition.224.4.4.2Limit.224.4.4.3Conformance.224.4.5Frequencyerror(demodulatedDSCsignal).224.4.5.1Definition.224.4.5.2Limit.224.4.5.3Conformance.224.4.6ModulationindexforDSC.224.4.6.1Definition.224.4.6.2Limit.224.4.6.3Conformance.224.4.7ModulationrateforDSC.224.4.7.1Definition.224.4.7.2Limit.224.4.7.3Conformance.234.4.8Testingofgeneratedcallsequences.234.4.8.1Definition.234.4.8.2Limit.234.4.8.3Conformance.234.4.9Harmonicdistortionandratedaudio-frequencyoutputpower.234.4.9.1Definition.234.4.9.2Limit.234.4.9.3Conformance.234.4.10Receiveraudiofrequencyresponse.234.4.10.1Definition.234.4.10.2Limit.244.4.10.3Conformance.244.4.11Receiverresidualnoiselevel.244.4.11.1Definition.244.4.11.2Limit.254.4.11.3Conformance.254.4.12Squelchoperation.254.4.12.1Definition.254.4.12.2Limit.254.4.12.3Conformance.25SIST EN 301 025-3:2001

ETSIETSIEN301025-3V1.1.1(2001-05)54.4.13Squelchhysteresis.254.4.13.1Definition.254.4.13.2Limit.254.4.13.3Conformance.254.4.14Dynamicrange.254.4.14.1Definition.254.4.14.2Limit.254.4.14.3Conformance.264.4.15VerificationofcorrectdecodingofvarioustypesofDSCcalls.264.4.15.1Definition.264.4.15.2Limit.264.4.15.3Conformance.265Testingforcompliancewithtechnicalrequirements.265.1Testconditions,powersupplyandambienttemperatures.265.1.1Arrangementsfortestsignalsappliedtothereceiverinput.265.1.2Squelch.265.1.3Normaltestmodulation.265.1.4Artificialantenna.275.1.5Arrangementsfortestsignalsappliedtothetransmitterinput.275.1.6Testchannels.275.1.7Generationandexaminationofthedigitalselectivecallsignal.275.1.8StandardtestsignalsforDSC.275.1.9Determinationofthesymbolerrorratiointheoutputofthereceivingpart.275.1.10Testconditions,powersources,andambienttemperatures.275.1.10.1Normalandextremetestconditions.275.1.10.2Testpowersource.285.1.11Normaltestconditions.285.1.11.1Normaltemperatureandhumidity.285.1.11.2Normalpowersources.285.1.11.2.1Batterypowersource.285.1.11.2.2Otherpowersources.285.1.12Extremetestconditions.285.1.12.1Extremetemperatures.285.1.12.2Extremevaluesoftestpowersources.285.1.12.2.1Batterypowersource.285.1.12.2.2Otherpowersources.285.1.13Procedurefortestsatextremetemperatures.295.2Interpretationofthemeasurementresults.295.3Essentialradiotestsuites.295.3.1Environmentaltests.295.3.1.1Introduction.295.3.1.2Procedure.295.3.1.3Performancecheck.305.3.1.4Vibrationtest.305.3.1.5Temperaturetests.305.3.1.5.1Dryheat.305.3.1.5.2Dampheat.315.3.1.5.3Lowtemperature.315.3.2Conformancetests.315.3.2.1Sensitivityofthemodulator,includingmicrophone.315.3.2.2Audiofrequencyresponse.315.3.2.3Audiofrequencyharmonicdistortionoftheemission.315.3.2.3.1Methodology.315.3.2.3.2Normaltestconditions.325.3.2.3.3Extremetestconditions.325.3.2.4Residualmodulationofthetransmitter.325.3.2.5Frequencyerror(demodulatedDSCsignal).325.3.2.6ModulationindexforDSC.325.3.2.7ModulationrateforDSC.325.3.2.8Testingofgeneratedcallsequences.335.4Othertestsuites.33SIST EN 301 025-3:2001

ETSIETSIEN301025-3V1.1.1(2001-05)65.4.1General.335.4.2Harmonicdistortionandratedaudio-frequencyoutputpower.335.4.3Receiveraudiofrequencyresponse.335.4.4Receiverresidualnoiselevel.345.4.5Squelchoperation.345.4.6Squelchhysteresis.345.4.7Dynamicrange.345.4.8VerificationofcorrectdecodingofvarioustypesofDSCcalls.35AnnexA(normative):TheENRequirementsTable(EN-RT).36AnnexB(normative):DSCCalls.38AnnexC(informative):TheENtitleintheofficiallanguages.39AnnexD(informative):Bibliography.40History.41SIST EN 301 025-3:2001

ETSIETSIEN301025-3V1.1.1(2001-05)7IntellectualPropertyRightsIPRsessentialorpotentiallyessentialtothepresentdocumentmayhavebeendeclaredtoETSI.TheinformationpertainingtotheseessentialIPRs,ifany,ispubliclyavailableforETSImembersandnon-members,andcanbefoundinETSISR000314:"IntellectualPropertyRights(IPRs);Essential,orpotentiallyEssential,IPRsnotifiedtoETSIinrespectofETSIstandards",whichisavailablefromtheETSISecretariat.LatestupdatesareavailableontheETSIWebserver(http://www.etsi.org/ipr).PursuanttotheETSIIPRPolicy,noinvestigation,includingIPRsearches,hasbeencarriedoutbyETSI.NoguaranteecanbegivenastotheexistenceofotherIPRsnotreferencedinETSISR000314(ortheupdatesontheETSIWebserver)whichare,ormaybe,ormaybecome,essentialtothepresentdocument.ForewordThisCandidateHarmonizedEuropeanStandard(Telecommunicationsseries)hasbeenproducedbyETSITechnicalCommitteeElectromagneticcompatibilityandRadiospectrumMatters(ERM).Thepresentdocumentispart3ofamulti-partdeliverablecoveringtheVHFradiotelephoneequipmentforgeneralcommunicationsandassociatedequipmentforClass"D"DigitalSelectiveCalling(DSC),asidentifiedbelow:Part1:"Technicalcharacteristicsandmethodsofmeasurement";Part2:"HarmonizedENunderarticle3.2oftheR&TTEDirective";Part3:"HarmonizedENunderarticle3.3(e)oftheR&TTEDirective".ThepresentdocumenthasbeenproducedbyETSIinresponsetoamandatefromtheEuropeanCommissionissuedunderCouncilDirective98/34/EClayingdownaprocedurefortheprovisionofinformationinthefieldoftechnicalstandardsandregulationsandfollowingtheCommissionDecision2000/638/ECof22September2000.ThepresentdocumentisintendedtobecomeaHarmonizedStandard,thereferenceofwhichwillbepublishedintheOfficialJournaloftheEuropeanCommunitiesreferencingtheDirective1999/5/EC[1]oftheEuropeanParliamentandoftheCouncilof9March1999onradioequipmentandtelecommunicationsterminalequipmentandthemutualrecognitionoftheirconformity("theR&TTEDirective").NationaltranspositiondatesDateofadoptionofthisEN:27April2001DateoflatestannouncementofthisEN(doa):31July2001DateoflatestpublicationofnewNationalStandardor endorsement of this EN (dop/e): 31 January 2003DateofwithdrawalofanyconflictingNationalStandard(dow):31January2003SIST EN 301 025-3:2001

ETSIETSIEN301025-3V1.1.1(2001-05)8IntroductionThepresentdocumentispartofasetofstandardsdesignedtofitinamodularstructuretocoverallradioandtelecommunicationsterminalequipmentundertheR&TTEDirective[1].Eachstandardisamoduleinthestructure.Themodularstructureisshowninfigure1.-Ifneeded,newstandardsforhumanexposuretoElectromagneticFields,-ifneeded,newstandardsforacousticsafetyUseofspectrum*IfneededScopedbyequipmentclassortypeScopedbyfrequencyand/orequipmenttypeDisability*Privacy*Fraud*Noharmtothenetwork*Emergency*Interworkingviathenetwork*InterworkingwiththenetworkNon-radioRadio(RE)Non-TTETTE3.1b3.23.3c3.3b3.3a3.3d3.3e3.3fRadioProductEMCExistingEMCstandardstobereplacedby a new, single, multi-part standardGenericandproductstandardsalsonotifiedunderEMCDirectiveStandardsalsonotifiedunderLVDirective3.1aNewradioharmonizedstandardsSpectrumEMCSafetyFigure1:ModularstructureforthevariousstandardsusedundertheR&TTEDirectiveSIST EN 301 025-3:2001

ETSIETSIEN301025-3V1.1.1(2001-05)9Thelefthandedgeofthefigure1showsthedifferentclausesofarticle3oftheR&TTEDirective[1].Forarticle3.3varioushorizontalboxesareshown.DottedlinesindicatethatatthetimeofpublicationofthisstandardessentialrequirementsintheseareashavetobeadoptedbytheCommission.Ifsuchessentialrequirementsareadopted,andasfarandaslongastheyareapplicable,theywilljustifyindividualstandardswhosescopeislikelytobespecifiedbyfunctionorinterfacetype.Theverticalboxesshowthestandardsunderarticle3.2fortheuseoftheradiospectrumbyradioequipment.Thescopesofthesestandardsarespecifiedeitherbyfrequency(normallyinthecasewherefrequencybandsareharmonized)orbyradioequipmenttype.For article 3.1b the diagram shows the new single multi-part product EMC standard for radio, and the existing collectionofgenericandproductstandardscurrentlyusedundertheEMCDirective[2].Thepartsofthisnewstandardwillbecomeavailableinthesecondhalfof2000,andtheexistingseparateproductEMCstandardswillbeuseduntilitisavailable.Forarticle3.1athediagramshowstheexistingsafetystandardscurrentlyusedundertheLVDirective[3]andnewstandardscoveringhumanexposuretoelectromagneticfields.Newstandardscoveringacousticsafetymayalsoberequired.Thebottomofthefigureshowstherelationshipofthestandardstoradioequipmentandtelecommunicationsterminalequipment.Aparticularequipmentmayberadioequipment,telecommunicationsterminalequipmentorboth.Aradiospectrumstandardwillapplyifitisradioequipment.Anarticle3.3standardwillapplyaswellonlyiftherelevantessentialrequirementundertheR&TTEDirective[1]isadoptedbytheCommissionandiftheequipmentinquestioniscoveredbythescopeofthecorrespondingstandard.Thus,dependingonthenatureoftheequipment,theessentialrequirementsundertheR&TTEDirective[1]maybecoveredinasetofstandards.Themodularityprinciplehasbeentakenbecause:• itminimizesthenumberofstandardsneeded.Becauseequipmentmay,infact,havemultipleinterfacesandfunctionsitisnotpracticabletoproduceasinglestandardforeachpossiblecombinationoffunctionsthatmayoccurinanequipment;• itprovidesscopeforstandardstobeadded:-underarticle3.2whennewfrequencybandsareagreed;or-underarticle3.3shouldtheCommissiontakethenecessarydecisions,withoutrequiringalterationofstandardsthatarealreadypublished;• itclarifies,simplifiesandpromotestheusageofHarmonizedStandardsastherelevantmeansofconformityassessment.SIST EN 301 025-3:2001

ETSIETSIEN301025-3V1.1.1(2001-05)101ScopeThepresentdocumentappliestoVHFradiotelephoneequipmentforgeneralcommunicationsandassociatedequipmentforClass"D"DigitalSelectiveCalling(DSC).Thisradioequipmentoperateswithinalloranypartofthefrequencyband156MHzto174MHzallocatedtotheMaritimeMobileServiceandutilizesclassofemissionG3E,andG2B.ThepresentdocumentisintendedtocovertheprovisionsofDirective1999/5/EC[1](R&TTEDirective)article3.3(e),whichstatesthatradioequipmentwithinthescopeofthepresentdocumentshallbesoconstructedthat:"itsupportscertainfeaturesensuringaccesstoemergencyservices".Inadditiontothepresentdocument,otherENsthatspecifytechnicalrequirementsinrespectofessentialrequirementsunderotherpartsofarticle3oftheR&TTEDirective[1]willapplytoequipmentwithinthescopeofthepresentdocument.NOTE:AlistofsuchENsisincludedonthewebsitehttp://www.newapproach.org/.2ReferencesThefollowingdocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthepresentdocument.• Referencesareeitherspecific(identifiedbydateofpublicationand/oreditionnumberorversionnumber)ornon-specific.• Foraspecificreference,subsequentrevisionsdonotapply.• Foranon-specificreference,thelatestversionapplies.[1]Directive1999/5/ECoftheEuropeanParliamentandoftheCouncilof9March1999onradioequipmentandtelecommunicationsterminalequipmentandthemutualrecognitionoftheirconformity.[2]CouncilDirective89/336/EECof3May1989ontheapproximationofthelawsoftheMemberStatesrelatingtoelectromagneticcompatibility.[3]CouncilDirective73/23/EECof19February1973ontheharmonizationofthelawsofMemberStatesrelatingtoelectricalequipmentdesignedforusewithincertainvoltagelimits.[4]ITURadioRegulations,AppendixS18(1998):"Tableoftransmittingfrequenciesintheband156-174MHzforstationsintheMaritimeMobileService".[5]ITU-TRecommendationE.161(1993):"Arrangementofdigits,lettersandsymbolsontelephonesandotherdevicesthatcanbeusedforgainingaccesstoatelephonenetwork".[6]ITU-RRecommendationM.493-9(1997):"Digitalselective-callingsystemforuseinthemaritimemobileservice".[7]IEC1162-1(1995):"Maritimenavigationandradiocommunicationequipmentandsystems-Digitalinterfaces-Part1:Singletalkerandmultiplelisteners".[8]ITU-RRecommendationM.825-1(1995):"Characteristicsofatranspondersystemusingdigitalselectivecallingtechniquesforusewithvesseltrafficservicesandship-to-shipidentification".[9]ETSIETR028(1994):"Empty".SIST EN 301 025-3:2001

ETSIETSIEN301025-3V1.1.1(2001-05)113Definitionsandabbreviations3.1DefinitionsForthepurposesofthepresentdocument,thetermsanddefinitionsintheR&TTEDirective[1],andthefollowingapply:environmentalprofile:rangeofenvironmentalconditionsunderwhichequipmentwithinthescopeofthepresentdocumentisrequiredtocomplywiththeprovisionsofthepresentdocumentclassD:classDequipmentisintendedtoprovideminimumfacilitiesforVHFDSCdistress,urgencyandsafetyaswellasroutinecallingandreception,notnecessarilyinfullaccordancewithIMOGMDSScarriagerequirementsforVHFinstallations(ITU-RRecommendationM.493-9[6])G3E:phase-modulation(Frequencymodulationwithapre-emphasisof6dB/octave)forspeechG2B:phase-modulationwithdigitalinformation,withasub-carrierforDSCoperationmodulationindex:ratiobetweenthefrequencydeviationandthefrequencyofthemodulationsignal3.2AbbreviationsForthepurposesofthepresentdocument,thefollowingabbreviationsapply:DSCDigitalSelectiveCallingEMCElectro-MagneticCompatibilitye.m.f.electromotiveforceEUTEquipmentUnderTestFMFrequencyModulationIMOInternationalMaritimeOrganizationLVLowVoltageMMSIMaritimeMobileServiceIdentityppmpartspermillionR&TTERadioandTelecommunicationsTerminalEquipmentRFRadioFrequencyr.m.s.rootmeansquareSINADSignal+Noise+DistortiontoNoise+DistortionVHFVeryHighFrequency4Technicalrequirementsspecifications4.1EnvironmentalprofileThetechnicalrequirementsofthepresentdocumentapplyundertheenvironmentalprofileforoperationoftheequipment,whichshallbedeterminedbytheenvironmentalclassoftheequipment.Theequipmentshallcomplywithallthetechnicalrequirementsofthepresentdocumentatalltimeswhenoperatingwithintheboundarylimitsoftherequiredoperationalenvironmentalprofile.SIST EN 301 025-3:2001

ETSIETSIEN301025-3V1.1.1(2001-05)124.2General,operationalandtechnicalrequirements4.2.1Generalandoperationalrequirements4.2.1.1CompositionTheequipmentshall,asaminimum,include:-aVHFradiotelephone;-aVHFradiotelephonereceiver;-adedicatedchannel70watchkeepingreceiverforDSCdecoder;-aDSCencoder;and-aDSCdecoder.4.2.1.2ConstructionThemechanicalandelectricalconstructionandfinishoftheequipmentshallconforminallrespectstogoodengineeringpractice,andtheequipmentshallbesuitableforuseonboardvessels.Allcontrolsshallbeofsufficientsizetoenabletheusualcontrolfunctionstobeeasilyperformedandthenumberofcontrolsshouldbetheminimumnecessaryforsimpleandsatisfactoryoperation.Adequatelydetailedoperatinginstructionsshallbeprovidedwiththeequipment.Theequipmentshallbecapableofoperatingonsinglefrequencyandtwo-frequencychannelswithmanualcontrol(simplex).TheequipmentshallbeabletooperateonallchannelsdefinedinappendixS18totheRadioRegulations[4].AdditionalVHFchannelsoutsidethosedefinedbyappendixS18totheRadioRegulations[4]mayalsobeprovided,butmeansshallbeprovidedtoblockanyoralloftheseadditionalchannels,asmayberequiredbythelicencebeforeinstallationonboardvessels.Itshallnotbepossiblefortheusertounblockanyblockedchannels.Theequipmentshallbesodesignedthatuseofchannel70forpurposesotherthanDSCisprevented.Itshallnotbepossibletotransmitwhileanyfrequencysynthesizerusedwithinthetransmitterisoutoflock.Itshallnotbepossibletotransmitduringchannelswitchingoperations.SIST EN 301 025-3:2001

ETSIETSIEN301025-3V1.1.1(2001-05)134.2.1.3ControlsandindicatorsTheusershallnothaveaccesstoanycontrolwhich,ifwronglyset,mightimpairthetechnicalcharacteristicsoftheequipment.Iftheequipmentcanbeoperatedfrommorethanoneposition,thecontrolunitprovidedatthepositionfromwherethevesselisnormallynavigatedshallhavepriorityandtheindividualcontrolunitsshallbeprovidedwithanindicatorshowingwhethertheequipmentisinoperation.Thefollowingcontrolsorfunctionsshallbeprovided:-DISTRESSBUTTON(clause4.2.1.4.3):thedefaultshallbeanundesignateddistressmessage;-CALL(clause4.2.1.4.1):thedefault(initialdisplay)shallbeanindividualcall;-CANCEL:toreverttotheinitialdisplay.Thecancelfunctionshalltakeplaceautomaticallyafteramaximumoffiveminutesofinactivity;-ENTER/Accept/OK:foracceptingamenuitem;-NUMERICKEYPAD:forinstanceforenteringMMSIforcallingandmanualpositioninformation.ThisshallconformtoITU-TRecommendationE.161[5];-ALPHA-NUMERICDISPLAY(clause4.2.2.4);-on/offswitchfortheentireinstallationwithavisualindicationthattheinstallationisinoperation;-amanualnon-lockingpush-to-talkswitchtooperatethetransmitterwithavisualindicationthatthetransmitterisactivated;-aswitchforreducingtransmitteroutputpowertonomorethan1Wwithavisualindicationthatlowpowerisselected;-anaudio-frequencypowervolumecontrol;-asquelchcontrol;-acontrolfordimmingtoextinctiontheequipmentilluminationwiththeexceptionofavisualindicator(clause4.2.1.4.3);-controlsformultiplewatchfacilities,ifprovided.Theequipmentshallhavemeanstoselectmanuallyachannelandshallindicatethedesignator,asshowninappendixS18totheRadioRegulations[4],ofthechannelatwhichtheinstallationisset.Thechanneldesignatorshallbelegibleirrespectiveoftheexternallightingconditions.Channel16shallbedistinctivelymarked.Selectionofchannel16,shallbepreferablybyreadilyaccessiblemeans(e.g.adistinctivelymarkedkey).Theinitialselectionofchannel16shallautomaticallyselectthemaximumtransmitterpower.SIST EN 301 025-3:2001

ETSIETSIEN301025-3V1.1.1(2001-05)144.2.1.4FacilitiesforcodinganddecodingofDSC4.2.1.4.1CallfunctionsThefacilitiesforcodingandcompositionofcallsshallbesoarrangedthatitispossiblefortheoperatorquicklyandpreciselytoenteracall.ThetypesofDSCcallsprovidedinthisequipmentarespecifiedinannexB.TheCALLfunctions(clause4.2.1.3)shallpermitselectionofthefollowingfunctions:-INDIVIDUAL:formakingacalltoaspecificMMSI;-ALLSHIPSURGENCY/SAFETY:formakingallshipscalls;-RECEIVEDCALLS:forretrievingstoredincomingDSCcalls;-OTHER:forequipmenthousekeepingfunctions.IfINDIVIDUALisselected,eitheraMANUALcall(clause4.2.1.4.2)oraDIRECTORYcallshallbeselected.TheDIRECTORYlistshallhaveafacilityforatleast10entries.TheirMMSIsshallbeprogrammable.4.2.1.4.2MANUALcallsTheMANUALcallfacilityshallpermittheentryofaMMSI.Ifthecalledstationisacoaststation(i.e.MMSIcommencing00)nofurtherinformationshallberequestedfromtheoperator.Ifthecalledstationisashipstationtheequipmentshallrequestinputofachannelnumber.Theequipmentshallassisttheoperatorbysuggestingasuitableinter-shipchannel.4.2.1.4.3DistresscallsItshallonlybepossibletotransmitdistressDSCcallsbymeansofasinglededicatedbuttonwhichisusedfornootherpurpose.ThisbuttonshallnotbeanykeyofITU-TRecommendationE.161[5]digitalinputpaneloranISOkeyboardprovidedontheequipment.Thisbuttonshallbeclearlyidentifiedandprotectedagainstinadvertentoperationwithaspringloadedcover.Thedistressalertinitiationshallrequireatleasttwoindependentactions.Avisualindicationandanacousticalarm(clause4.2.2.6.3)shallbeprovidedtoshowthatadistressalerthasbeeninitiated.Thereshallbeatimedelayofatleast3sbetweeninitialoperationofthebuttonandthealertbeingactivated.Itshallbepossibletoselectthenatureofdistresspriortoinitiatingthetransmissionofadistresscall.Thedefaultnatureofdistressshallbetheundesignateddistress.Initiationofadistresscallshallautomaticallyhavepriorityoveranyotheroperationoftheequipment.Theequipmentshallautomaticallyselectchannel70andthemaximumtransmitterpower.Manualmeansshallbeprovidedtodiscontinuetransmissionofadistresscall.Thedistress
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