Back to Collection NOAA/NESDIS/NGDC/MGG/Sonar_Water_Column

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referenceSystemInfo
identificationInfo
contentInfo
distributionInfo
dataQualityInfo
dataQualityInfo
dataQualityInfo
acquisitionInformation

EM2040 Water Column Sonar Data Collected During KRY13_03
 (MI_Metadata)
    fileIdentifier:  gov.noaa.ngdc.mgg.wcd:KRY13_03_EM2040
    language:  eng; USA
    characterSet:  (MD_CharacterSetCode) utf8
    hierarchyLevel:  (MD_ScopeCode) series
    hierarchyLevelName:  Water Column Sonar Series-Level Metadata
    contact:  (CI_ResponsibleParty)
        organisationName:  NOAA National Centers for Environmental Information
        contactInfo:  (CI_Contact)
            address:  (CI_Address)
                electronicMailAddress:  ncei.info@noaa.gov
            onlineResource:  (CI_OnlineResource)
                linkage: https://www.ncei.noaa.gov/contact
                name:  NCEI Contact Information
                description:  Information for contacts at NCEI.
                function:  (CI_OnLineFunctionCode) information
        role:  (CI_RoleCode) pointOfContact
    dateStamp:  2020-12-30
    metadataStandardName:  ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
    metadataStandardVersion:  ISO 19115-2:2009(E)
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    spatialRepresentationInfo:  (MD_VectorSpatialRepresentation)
        geometricObjects:  (MD_GeometricObjects)
            geometricObjectType:  (MD_GeometricObjectTypeCode) curve
            geometricObjectCount:  6
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    referenceSystemInfo:  (MD_ReferenceSystem)
        referenceSystemIdentifier:  (RS_Identifier)
            authority:  (CI_Citation)
                title:  World Geodetic System 1984
                alternateTitle:  WGS 84
                date:  (CI_Date)
                    date:  2007-08-27
                    dateType:  (CI_DateTypeCode) revision
                citedResponsibleParty:  (CI_ResponsibleParty)
                    organisationName: (withheld)
                    contactInfo:  (CI_Contact)
                        onlineResource:  (CI_OnlineResource)
                            linkage: https://epsg.org/crs_4326/WGS-84.html
                            name:  WGS 84
                            description:  GML of World Geodetic System 1984 coordinate reference system.
                            function:  (CI_OnLineFunctionCode) information
                    role:  (CI_RoleCode) resourceProvider
                citedResponsibleParty:  (CI_ResponsibleParty)
                    organisationName:  European Petroleum Survey Group
                    contactInfo:  (CI_Contact)
                        onlineResource:  (CI_OnlineResource)
                            linkage: https://epsg.org/home.html
                            name:  European Petroleum Survey Group Geodetic Parameter Registry
                            description:  Registry that accesses the EPSG Geodetic Parameter Dataset, which is a structured dataset of Coordinate Reference Systems and Coordinate Transformations.
                            function:  (CI_OnLineFunctionCode) search
                    role:  (CI_RoleCode) publisher
            code:  urn:ogc:def:crs:EPSG::4326
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    referenceSystemInfo:  (MD_ReferenceSystem)
        referenceSystemIdentifier:  (RS_Identifier)
            authority:  (CI_Citation)
                title:  Vertical Datum: Unknown
                date: (inapplicable)
            code:  Vertical Datum: Unknown
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    identificationInfo:  (MD_DataIdentification)
        citation:  (CI_Citation)
            title:  EM2040 Water Column Sonar Data Collected During KRY13_03
            date:  (CI_Date)
                date:  2013-07-05
                dateType:  (CI_DateTypeCode) creation
            date:  (CI_Date)
                date:  2015-12-03
                dateType:  (CI_DateTypeCode) publication
            identifier:  (MD_Identifier)
                authority:  (CI_Citation)
                    title:  NOAA National Centers for Environmental Information
                    date: (inapplicable)
                code:  KRY13_03_EM2040
            identifier:  (MD_Identifier)
                authority:  (CI_Citation)
                    title:  International DOI Foundation (IDF)
                    date: (inapplicable)
                code:
                  Anchor:  DOI doi:10.25921/g7b2-cx69
            identifier:  (MD_Identifier)
                authority:  (CI_Citation)
                    title:  NOAA National Centers for Environmental Information
                    date: (inapplicable)
                code:  NCEI Metadata ID:gov.noaa.ngdc.mgg.wcd:KRY13_03_EM2040
            citedResponsibleParty:  (CI_ResponsibleParty)
                organisationName:  NOAA National Centers for Environmental Information
                role:  (CI_RoleCode) custodian
            citedResponsibleParty:  (CI_ResponsibleParty)
                organisationName:  NOAA National Centers for Environmental Information
                role:  (CI_RoleCode) publisher
            citedResponsibleParty:  (CI_ResponsibleParty)
                organisationName:  Geological Survey of Ireland (GSI)
                contactInfo:  (CI_Contact)
                    phone:  (CI_Telephone)
                        voice:  +353-1-678 2000
                    address:  (CI_Address)
                        deliveryPoint:  Haddington Road
                        city:  Dublin
                        administrativeArea:
                        postalCode:  D04 K7X4
                        country:  IE
                        electronicMailAddress:  gsiwebmaster@gsi.ie
                role:  (CI_RoleCode) author
        abstract:  Cruise KRY13_03 (EM2040)
        purpose:  This data is available to the public for a wide variety of uses including scientific research and analysis.
        status:  (MD_ProgressCode) completed
        pointOfContact:  (CI_ResponsibleParty)
            organisationName:  NOAA National Centers for Environmental Information
            contactInfo:  (CI_Contact)
                address:  (CI_Address)
                    electronicMailAddress:  ncei.info@noaa.gov
                onlineResource:  (CI_OnlineResource)
                    linkage: https://www.ncei.noaa.gov/contact
                    name:  NCEI Contact Information
                    description:  Information for contacts at NCEI.
                    function:  (CI_OnLineFunctionCode) information
            role:  (CI_RoleCode) pointOfContact
        pointOfContact:  (CI_ResponsibleParty)
            organisationName:  NOAA National Centers for Environmental Information
            positionName:  Water Column Sonar Data Manager
            contactInfo:  (CI_Contact)
                phone:  (CI_Telephone)
                    voice:  (303) 497-4742
                address:  (CI_Address)
                    deliveryPoint:  325 Broadway, Mail Code E/NE42
                    city:  Boulder
                    administrativeArea:  CO
                    postalCode:  80305-3328
                    country:  USA
                    electronicMailAddress:  wcd.info@noaa.gov
            role:  (CI_RoleCode) pointOfContact
        resourceMaintenance:  (MD_MaintenanceInformation)
            maintenanceAndUpdateFrequency:  (MD_MaintenanceFrequencyCode) notPlanned
        descriptiveKeywords:  (MD_Keywords)
            keyword:  Earth Science > Oceans > Ocean Acoustics > Acoustic Scattering
            keyword:  Earth Science > Oceans > Aquatic Sciences > Fisheries
            keyword:  Earth Science > Oceans > Ocean Acoustics
            keyword:  Earth Science > Biosphere > Ecosystems > Marine Ecosystems > Pelagic
            keyword:  Earth Science > Biosphere > Ecosystems > Marine Ecosystems
            keyword:  Earth Science > Biosphere > Ecosystems > Marine Ecosystems > Benthic
            keyword:  Earth Science > Biosphere > Ecosystems > Aquatic Ecosystems
            keyword:  Earth Science > Oceans > Bathymetry/Seafloor Topography > Bathymetry
            keyword:  Earth Science > Oceans > Bathymetry/Seafloor Topography > Seafloor Topography
            type:  (MD_KeywordTypeCode) theme
            thesaurusName:  (CI_Citation)
                title:  Global Change Master Directory (GCMD) Science Keywords
                date:  (CI_Date)
                    date:  2020-01-09
                    dateType:  (CI_DateTypeCode) publication
                edition:  9.1
                citedResponsibleParty:  (CI_ResponsibleParty)
                    organisationName:  NASA Goddard Space Flight Center, Earth Science Data and Information System
                    contactInfo:  (CI_Contact)
                        onlineResource:  (CI_OnlineResource)
                            linkage: https://www.earthdata.nasa.gov/learn/find-data/idn/gcmd-keywords
                            name:  Global Change Master Directory (GCMD) Keywords
                            description:  The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords.
                            function:  (CI_OnLineFunctionCode) information
                    role:  (CI_RoleCode) custodian
        descriptiveKeywords:  (MD_Keywords)
            keyword:  North Atlantic Ocean
            type:  (MD_KeywordTypeCode) place
            thesaurusName:  (CI_Citation)
                title:  International Hydrographic Organization (IHO) Sea Area ("Limits of Oceans and Seas" publication S-23)
                date:  (CI_Date)
                    date:  2010-08-24
                    dateType:  (CI_DateTypeCode) revision
                citedResponsibleParty:  (CI_ResponsibleParty)
                    organisationName:  International Hydrographic Organization (IHO) Sea Area ("Limits of Oceans and Seas" publication S-23)
                    contactInfo:  (CI_Contact)
                        onlineResource:  (CI_OnlineResource)
                            linkage: https://iho.int/
                            name:  International Hydrographic Organization (IHO) Sea Area ("Limits of Oceans and Seas" publication S-23)
                            description:  Publication of Sea Areas is maintained by IHO.
                            function:  (CI_OnLineFunctionCode) information
                    role:  (CI_RoleCode) resourceProvider
        descriptiveKeywords:  (MD_Keywords)
            keyword:  DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
            keyword:  DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
            type:  (MD_KeywordTypeCode) dataCentre
            thesaurusName:  (CI_Citation)
                title:  Global Change Master Directory (GCMD) Data Center Keywords
                date:  (CI_Date)
                    date:  2020-01-09
                    dateType:  (CI_DateTypeCode) publication
                edition:  9.1
                citedResponsibleParty:  (CI_ResponsibleParty)
                    organisationName:  NASA Goddard Space Flight Center, Earth Science Data and Information System
                    contactInfo:  (CI_Contact)
                        onlineResource:  (CI_OnlineResource)
                            linkage: https://www.earthdata.nasa.gov/learn/find-data/idn/gcmd-keywords
                            name:  Global Change Master Directory (GCMD) Keywords
                            description:  The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords.
                            function:  (CI_OnLineFunctionCode) information
                    role:  (CI_RoleCode) custodian
        descriptiveKeywords:  (MD_Keywords)
            keyword:  Vertical Location > Water Column
            type:  (MD_KeywordTypeCode) place
            thesaurusName:  (CI_Citation)
                title:  Global Change Master Directory (GCMD) Location Keywords
                date:  (CI_Date)
                    date:  2020-01-09
                    dateType:  (CI_DateTypeCode) publication
                edition:  9.1
                citedResponsibleParty:  (CI_ResponsibleParty)
                    organisationName:  NASA Goddard Space Flight Center, Earth Science Data and Information System
                    contactInfo:  (CI_Contact)
                        onlineResource:  (CI_OnlineResource)
                            linkage: https://www.earthdata.nasa.gov/learn/find-data/idn/gcmd-keywords
                            name:  Global Change Master Directory (GCMD) Keywords
                            description:  The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords.
                            function:  (CI_OnLineFunctionCode) information
                    role:  (CI_RoleCode) custodian
        descriptiveKeywords:  (MD_Keywords)
            keyword:  In Situ/Laboratory Instruments > Profilers/Sounders > Acoustic Sounders > WCMS > Water Column Mapping System
            type:  (MD_KeywordTypeCode) instrument
            thesaurusName:  (CI_Citation)
                title:  Global Change Master Directory (GCMD) Instrument Keywords
                date:  (CI_Date)
                    date:  2020-01-09
                    dateType:  (CI_DateTypeCode) publication
                edition:  9.1
                citedResponsibleParty:  (CI_ResponsibleParty)
                    organisationName:  NASA Goddard Space Flight Center, Earth Science Data and Information System
                    contactInfo:  (CI_Contact)
                        onlineResource:  (CI_OnlineResource)
                            linkage: https://www.earthdata.nasa.gov/learn/find-data/idn/gcmd-keywords
                            name:  Global Change Master Directory (GCMD) Keywords
                            description:  The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords.
                            function:  (CI_OnLineFunctionCode) information
                    role:  (CI_RoleCode) custodian
        resourceConstraints:  (MD_LegalConstraints)
            useConstraints:  (MD_RestrictionCode) otherRestrictions
            otherConstraints:  Cite as: Geological Survey of Ireland (GSI). 2013. 'EM2040 Water Column Sonar Data Collected During KRY13_03'. NOAA National Centers for Environmental Information. https://doi.org/10.25921/g7b2-cx69 [access date]
        resourceConstraints:  (MD_LegalConstraints)
            accessConstraints:  (MD_RestrictionCode) otherRestrictions
            otherConstraints:  Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives.
        resourceConstraints:  (MD_LegalConstraints)
            useConstraints:  (MD_RestrictionCode) otherRestrictions
            otherConstraints:  Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.
        resourceConstraints:  (MD_Constraints)
            useLimitation:  These data are considered raw and have not been subjected to the NOAA's quality control or quality assurance procedures. They are released for limited public use as preliminary data to be used only with appropriate caution. NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.
        resourceConstraints:  (MD_Constraints)
            useLimitation:  Not subject to copyright protection within the United States.
        resourceConstraints:  (MD_LegalConstraints)
            accessConstraints:  (MD_RestrictionCode) otherRestrictions
            otherConstraints:  Resource may not be available for up to one year after initial collection.
        aggregationInfo:  (MD_AggregateInformation)
            aggregateDataSetIdentifier:  (MD_Identifier)
                code:  KRY13_03
            associationType:  (DS_AssociationTypeCode) largerWorkCitation
            initiativeType:  (DS_InitiativeTypeCode) operation
        language:  eng; USA
        topicCategory:  (MD_TopicCategoryCode) oceans
        topicCategory:  (MD_TopicCategoryCode) geoscientificInformation
        extent:  (EX_Extent)
            geographicElement:  (EX_GeographicBoundingBox)
                westBoundLongitude:  -8.70138
                eastBoundLongitude:  -8.24562
                southBoundLatitude:  51.40972
                northBoundLatitude:  51.47222
            temporalElement:  (EX_TemporalExtent)
                extent:
                  TimePeriod:
                    beginPosition:  2013-07-05T14:29:45
                    endPosition:  2013-07-05T18:14:43
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    contentInfo:  (MI_CoverageDescription)
        attributeDescription:
          RecordType:  Trackline
        contentType:  (MD_CoverageContentTypeCode) physicalMeasurement
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    distributionInfo:  (MD_Distribution)
        distributor:  (MD_Distributor)
            distributorContact:  (CI_ResponsibleParty)
                organisationName:  NOAA National Centers for Environmental Information
                contactInfo:  (CI_Contact)
                    address:  (CI_Address)
                        electronicMailAddress:  ncei.info@noaa.gov
                    onlineResource:  (CI_OnlineResource)
                        linkage: https://www.ncei.noaa.gov/contact
                        name:  NCEI Contact Information
                        description:  Information for contacts at NCEI.
                        function:  (CI_OnLineFunctionCode) information
                role:  (CI_RoleCode) distributor
            distributionOrderProcess:  (MD_StandardOrderProcess)
                fees:  Free
                orderingInstructions:  Contact the NCEI Water Column Sonar Data Manager to order data.
            distributorFormat:  (MD_Format)
                name:  Kongsberg EM2040 water column data (.wcd) format
                version:  1
                specification:  Kongsberg/Simrad .raw files are generated by ME70, EK60 or ES60 instruments. They contain power and optionally angular position data with each beam/frequency identified by an independent channel. See the Simrad interface specification manual for further information. The .wcd files are generated by Kongsberg EM302 or EM122 instruments. See Kongsberg documentation for more information.
            distributorTransferOptions:  (MD_DigitalTransferOptions)
                onLine:  (CI_OnlineResource)
                    linkage: https://www.ngdc.noaa.gov/maps/water_column_sonar/index.html?surveys=KRY13_03&instruments=EM2040
                    protocol:  HTTPS
                    name:  Water Column Sonar Data Map Viewer
                    description:  Interactive map viewer to allow discovery and access to water column sonar data
                    function:  (CI_OnLineFunctionCode) search
            distributorTransferOptions:  (MD_DigitalTransferOptions)
                onLine:  (CI_OnlineResource)
                    linkage: https://www.ngdc.noaa.gov/mgg/wcd/
                    protocol:  HTTPS
                    name:  Water Column Sonar Data Archive Homepage
                    description:  Web page containing information on the water column sonar data archive.
                    function:  (CI_OnLineFunctionCode) information
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    dataQualityInfo:  (DQ_DataQuality)
        scope:  (DQ_Scope)
            level:  (MD_ScopeCode) collectionHardware
            levelDescription:  (MD_ScopeDescription)
                other:  Instrument calibration information
        lineage:  (LI_Lineage)
            statement:
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    dataQualityInfo:  (DQ_DataQuality)
        scope:  (DQ_Scope)
            level:  (MD_ScopeCode) series
        report:  (DQ_AbsoluteExternalPositionalAccuracy)
            nameOfMeasure:  Horizontal Positional Accuracy
            result:  (DQ_ConformanceResult)
                specification: (inapplicable)
                explanation:  Positional accuracy dependent on navigation GPS, ship motion correction, and sound velocity profile accuracy.
                pass:  true
        report:  (DQ_AbsoluteExternalPositionalAccuracy)
            nameOfMeasure:  Vertical Positional Accuracy
            result:  (DQ_ConformanceResult)
                specification: (inapplicable)
                explanation:  Vertical accuracy is dependent on navigation GPS and ship motion corrections.
                pass:  true
        lineage:  (LI_Lineage)
            processStep:  (LI_ProcessStep)
                description:  Raw unprocessed data files
                dateTime:
                  DateTime:  2013-07-05T14:29:45
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    dataQualityInfo:  (DQ_DataQuality)
        scope:  (DQ_Scope)
            level:  (MD_ScopeCode) series
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    acquisitionInformation:  (MI_AcquisitionInformation)
        instrument:  (MI_Instrument)
            citation:  (CI_Citation)
                title:  Kongsberg EM2040 Multibeam Echosounder
                date: (unknown)
                identifier:  (MD_Identifier)
                    code:  EM2040
                citedResponsibleParty:  (CI_ResponsibleParty)
                    organisationName:  Kongsberg Maritime
                    contactInfo:  (CI_Contact)
                        phone:  (CI_Telephone)
                            voice:  +47 33 03 24 07
                            facsimile:  +47 322 85 014
                        address:  (CI_Address)
                            deliveryPoint:  P.O. Box 483
                            deliveryPoint:  NO-3601
                            city:  Kongsberg
                            country:  Norway
                            electronicMailAddress:  km.support@kongsberg.com
                        onlineResource:  (CI_OnlineResource)
                            linkage: http://www.km.kongsberg.com/ks/web/nokbg0240.nsf/AllWeb/C75143F8AA145B48C12575E500276CA4?OpenDocument
                    role:  (CI_RoleCode) resourceProvider
            identifier:  (MD_Identifier)
                code:  Kongsberg EM2040
            type:  Multibeam Echosounder
            description:  The EM 2040 multibeam echosounder is the first system to bring all the advanced features of deep water multibeams to the near bottom sounding environment. Important deep water system features included with the EM 2040 are dual swath per ping (EM2040D) to allow a doubling of survey speed, FM chirp to achieve a much longer range capability, complete roll, pitch and yaw stabilization, and nearfield focusing both on transmit and receive. The EM 2040 is modular, allowing the user to tailor the beamwidths to the operational requirements, 0.4 by 0.7 and 0.7 by 0.7 degrees. The operating bandwidth available on the EM 2040 is unprecedented, from 200 to 400 kHz, which is a full octave, and this is achieved with the standard transducers. The operator can thus choose the best operating frequency for the application. The EM 2040 is well suited for surveys meeting the IHO-S44 special order. The standard depth rating of the EM 2040 subsea parts is 6000 meters. The system is ideal for operation on subsea vehicles such as ROVs or AUVs. The transmit transducer has an angular coverage of 200 degrees (±100 degrees) as standard, allowing a coverage of 5.5 times water depth when matched with a single receive transducer. Adding a second receive transducer allows surveying to the water surface or up to 10 times water depth on flat bottoms.
        operation:  (MI_Operation)
            identifier:  (MD_Identifier)
                code:  KRY13_03_EM2040
            status:  (MD_ProgressCode) completed
            parentOperation: (inapplicable)
        platform:  (MI_Platform)
            citation:  (CI_Citation)
                title:  Research Vessel RV Keary
                date:  (CI_Date)
                    date:  2015-12-03
                    dateType:  (CI_DateTypeCode) creation
            identifier:  (MD_Identifier)
                code:  Keary
            description:  The RV Keary was formally dedicated by Minister Conor Lenihan and Mrs. Barbara Keary on October 6th 2009 at Poolbeg Yacht Club, Dublin. The launch coincided with a celebratory 10th anniversary conference of seabed surveying in Ireland, Seabed 10. According to Minister Lenihan, ¿in commissioning the new vessel, RV KEARY, we will also see cost effective mapping of our shallowest waters and a valuable addition to our national research capacity¿. The RV Keary is owned by the Geological Survey of Ireland and will play an important role in INFOMAR¿s commitment to survey the 26 priority bays and 3 priority areas outlined in the programmes strategy. The vessel is named after Raymond Keary, one of Ireland¿s pioneering marine geologists. It is a purpose built, aluminium catamaran designed for the survey of shallow waters, with a draft of only 1.7m. The 15 metre fully-equipped and state of the art hydrographic/geophysical launch will deliver survey data that will meet all required international specifications.
            instrument:  (MI_Instrument)
                citation:  (CI_Citation)
                    title:  Kongsberg EM2040 Multibeam Echosounder
                    date: (unknown)
                    identifier:  (MD_Identifier)
                        code:  EM2040
                    citedResponsibleParty:  (CI_ResponsibleParty)
                        organisationName:  Kongsberg Maritime
                        contactInfo:  (CI_Contact)
                            phone:  (CI_Telephone)
                                voice:  +47 33 03 24 07
                                facsimile:  +47 322 85 014
                            address:  (CI_Address)
                                deliveryPoint:  P.O. Box 483
                                deliveryPoint:  NO-3601
                                city:  Kongsberg
                                country:  Norway
                                electronicMailAddress:  km.support@kongsberg.com
                            onlineResource:  (CI_OnlineResource)
                                linkage: http://www.km.kongsberg.com/ks/web/nokbg0240.nsf/AllWeb/C75143F8AA145B48C12575E500276CA4?OpenDocument
                        role:  (CI_RoleCode) resourceProvider
                identifier:  (MD_Identifier)
                    code:  Kongsberg EM2040
                type:  Multibeam Echosounder
                description:  The EM 2040 multibeam echosounder is the first system to bring all the advanced features of deep water multibeams to the near bottom sounding environment. Important deep water system features included with the EM 2040 are dual swath per ping (EM2040D) to allow a doubling of survey speed, FM chirp to achieve a much longer range capability, complete roll, pitch and yaw stabilization, and nearfield focusing both on transmit and receive. The EM 2040 is modular, allowing the user to tailor the beamwidths to the operational requirements, 0.4 by 0.7 and 0.7 by 0.7 degrees. The operating bandwidth available on the EM 2040 is unprecedented, from 200 to 400 kHz, which is a full octave, and this is achieved with the standard transducers. The operator can thus choose the best operating frequency for the application. The EM 2040 is well suited for surveys meeting the IHO-S44 special order. The standard depth rating of the EM 2040 subsea parts is 6000 meters. The system is ideal for operation on subsea vehicles such as ROVs or AUVs. The transmit transducer has an angular coverage of 200 degrees (±100 degrees) as standard, allowing a coverage of 5.5 times water depth when matched with a single receive transducer. Adding a second receive transducer allows surveying to the water surface or up to 10 times water depth on flat bottoms.