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              <gmd:extent>
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                <gco:CharacterString>In most cases, electronic downloads of the data are free. However, fees may apply for custom orders, data certifications, copies of analog materials, and data distribution on physical media.</gco:CharacterString>
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                <gco:CharacterString>Contact NCEI for other distribution options and instructions.</gco:CharacterString>
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                <gco:CharacterString>Originator data format</gco:CharacterString>
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              <gmd:transferSize>
                <gco:Real>0.252</gco:Real>
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              <gmd:onLine>
                <gmd:CI_OnlineResource>
                  <gmd:linkage>
                    <gmd:URL>https://doi.org/10.25921/s3hw-kd48</gmd:URL>
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                  <gmd:protocol>
                    <gco:CharacterString>HTTPS</gco:CharacterString>
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                  <gmd:applicationProfile>
                    <gco:CharacterString>Web browser</gco:CharacterString>
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                    <gco:CharacterString>NCEI Dataset Landing Page</gco:CharacterString>
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                  <gmd:description>
                    <gco:CharacterString>Navigate directly to the URL for a descriptive web page with download links.</gco:CharacterString>
                  </gmd:description>
                  <gmd:function>
                    <gmd:CI_OnLineFunctionCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode" codeListValue="information">information</gmd:CI_OnLineFunctionCode>
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                <gmd:CI_OnlineResource>
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                    <gco:CharacterString>HTTPS</gco:CharacterString>
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                  <gmd:applicationProfile>
                    <gco:CharacterString>Web browser</gco:CharacterString>
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                    <gco:CharacterString>Descriptive Information</gco:CharacterString>
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                  <gmd:description>
                    <gco:CharacterString>Navigate directly to the URL for a descriptive web page with download links.</gco:CharacterString>
                  </gmd:description>
                  <gmd:function>
                    <gmd:CI_OnLineFunctionCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode" codeListValue="information">information</gmd:CI_OnLineFunctionCode>
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                <gmd:CI_OnlineResource>
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              <gmd:onLine>
                <gmd:CI_OnlineResource>
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                    <gmd:URL>ftp://ftp-oceans.ncei.noaa.gov/nodc/archive/arc0232/0301713/</gmd:URL>
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                  <gmd:protocol>
                    <gco:CharacterString>FTP</gco:CharacterString>
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                  <gmd:applicationProfile>
                    <gco:CharacterString>Any FTP client</gco:CharacterString>
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                  <gmd:description>
                    <gco:CharacterString>These data are available through the File Transfer Protocol (FTP). FTP is no longer supported by most internet browsers. You may copy and paste the FTP link to the data into an FTP client (e.g., FileZilla or WinSCP).</gco:CharacterString>
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Units: meter;
Observation Category: in situ;
Sampling Instrument: sonar;
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Units: degrees C;
Observation Category: in situ;
Sampling Instrument: temperature sensor;
Sampling and Analyzing Method: Water temperature in degrees Celsius at which the sample was collected. Temperature collected with calibrated sensor mounted on ROV Hercules.</gco:CharacterString>
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Units: micromole/liter;
Observation Category: in situ;
Sampling Instrument: oxygen sensor;
Sampling and Analyzing Method: Dissolved oxygen concentration in micromolar at which the sample was collected. Concentration measured with calibrated sensor mounted on ROV Hercules and corrected for temperature, salinity, and pressure.</gco:CharacterString>
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Units: 16S rRNA gene copies per gram;
Observation Category: laboratory analysis;
Sampling Instrument: quantitative PCR;
Sampling and Analyzing Method: Concentration of 16S rRNA gene copies in bulk extraction of rock samples (in grams) or Niskin water samples (in milliliters), as measured by quantitative polymerase chain reaction. n.a.: not applicable as sample was not measured for this analyte. b.d.l.: below detection limit for samples analyzed but with data being below the detection limit of the method.</gco:CharacterString>
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Units: # 16S rRNA gene reads;
Observation Category: laboratory analysis;
Sampling Instrument: DNA sequencer;
Sampling and Analyzing Method: Quantity of sequence reads created from sequencing of the 16S rRNA genes in each samples, indicating the depth of sequencing for each sample. n.a.: not applicable as sample was not measured for this analyte. b.d.l.: below detection limit for samples analyzed but with data being below the detection limit of the method.</gco:CharacterString>
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                <gco:CharacterString>Parameter or Variable: DNA (calculated);
Units: # 16S rRNA gene ASV;
Observation Category: laboratory analysis;
Sampling Instrument: DNA Sequencer;
Sampling and Analyzing Method: Quantity of unique artificial sequence units (ASV) determined from sequencing of the 16A rRNA gene reads in the samples. n.a.: not applicable as sample was not measured for this analyte. b.d.l.: below detection limit for samples analyzed but with data being below the detection limit of the method.</gco:CharacterString>
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                <gco:CharacterString>Parameter or Variable: NCBI BioProject ID (calculated);
Units: not applicable;
Observation Category: other;
Sampling Instrument: not applicable;
Sampling and Analyzing Method: List of the BioProject ID in the National Center for Biotechnology Information (NCBI) database Sequence Read Archive (https://www.ncbi.nlm.nih.gov) where 16S rRNA data from the sample can be found. n.a.: not applicable as sample was not measured for this analyte. b.d.l.: below detection limit for samples analyzed but with data being below the detection limit of the method.</gco:CharacterString>
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                <gco:CharacterString>Parameter or Variable: NCBI BioSample ID (calculated);
Units: not applicable;
Observation Category: other;
Sampling Instrument: not applicable;
Sampling and Analyzing Method: List of the unique BioSample ID in the National Center for Biotechnology Information (NCBI) database Sequence Read Archive (https://www.ncbi.nlm.nih.gov) where 16S rRNA data from the sample can be found. n.a.: not applicable as sample was not measured for this analyte. b.d.l.: below detection limit for samples analyzed but with data being below the detection limit of the method.</gco:CharacterString>
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Units: cells per cubic centimeter;
Observation Category: laboratory analysis;
Sampling Instrument: Flow Cytometer;
Sampling and Analyzing Method: Quantity of cellular biomass (in cells per cubic centimeter) in rock, water, and sediment samples as determined by fluorescence activated cell sorting (FACS) of cell extracts from bulk samples after staining cells with SYTO9 dye. n.a.: not applicable; n.m.: not measured.</gco:CharacterString>
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Units: average weight percent;
Observation Category: laboratory analysis;
Sampling Instrument: elemental analyzer;
Sampling and Analyzing Method: Average concentration of particulate organic carbon (POC) in the sample in weight percent from duplicate analysis of subsamples. n.a.: not applicable as samples for this analysis were not collected.</gco:CharacterString>
              </gmd:description>
            </gmi:LE_ProcessStep>
          </gmd:processStep>
          <gmd:processStep>
            <gmi:LE_ProcessStep>
              <gmd:description>
                <gco:CharacterString>Parameter or Variable: PARTICULATE ORGANIC CARBON (calculated);
Units: standard deviation weight percent;
Observation Category: laboratory analysis;
Sampling Instrument: elemental analyzer;
Sampling and Analyzing Method: Standard deviation of the concentration of particulate organic carbon (POC) in the sample in weight percent from duplicate analysis of subsamples. n.a.: not applicable as samples for this analysis were not collected.</gco:CharacterString>
              </gmd:description>
            </gmi:LE_ProcessStep>
          </gmd:processStep>
          <gmd:processStep>
            <gmi:LE_ProcessStep>
              <gmd:description>
                <gco:CharacterString>Parameter or Variable: TOTAL CARBON (calculated);
Units: average weight percent;
Observation Category: laboratory analysis;
Sampling Instrument: elemental analyzer;
Sampling and Analyzing Method: Average concentration of total carbon (TC) in the sample in weight percent from duplicate analysis of subsamples. n.a.: not applicable as samples for this analysis were not collected.</gco:CharacterString>
              </gmd:description>
            </gmi:LE_ProcessStep>
          </gmd:processStep>
          <gmd:processStep>
            <gmi:LE_ProcessStep>
              <gmd:description>
                <gco:CharacterString>Parameter or Variable: TOTAL CARBON (calculated);
Units: standard deviation weight percent;
Observation Category: laboratory analysis;
Sampling Instrument: elemental analyzer;
Sampling and Analyzing Method: Standard deviation of the concentration of total carbon (TC) in the sample in weight percent from duplicate analysis of subsamples. n.a.: not applicable as samples for this analysis were not collected.</gco:CharacterString>
              </gmd:description>
            </gmi:LE_ProcessStep>
          </gmd:processStep>
          <gmd:processStep>
            <gmi:LE_ProcessStep>
              <gmd:description>
                <gco:CharacterString>Parameter or Variable: PARTICULATE ORGANIC CARBON (measured);
Units: average del13C;
Observation Category: laboratory analysis;
Sampling Instrument: isotope ration mass spectrometer;
Sampling and Analyzing Method: Average value of the ratio of 13C to 12C in particulate organic carbon (POC) in the sample in delta notation from duplicate analysis of subsamples. n.a.: not applicable as samples for this analysis were not collected.</gco:CharacterString>
              </gmd:description>
            </gmi:LE_ProcessStep>
          </gmd:processStep>
          <gmd:processStep>
            <gmi:LE_ProcessStep>
              <gmd:description>
                <gco:CharacterString>Parameter or Variable: PARTICULATE ORGANIC CARBON (calculated);
Units: standard deviation of del13C;
Observation Category: laboratory analysis;
Sampling Instrument: isotope ratio mass spectrometer;
Sampling and Analyzing Method: Standard deviation of the ratio of 13C to 12C in particulate organic carbon (POC) in the sample in delta notation from duplicate analysis of subsamples. n.a.: not applicable as samples for this analysis were not collected.</gco:CharacterString>
              </gmd:description>
            </gmi:LE_ProcessStep>
          </gmd:processStep>
          <gmd:processStep>
            <gmi:LE_ProcessStep>
              <gmd:description>
                <gco:CharacterString>Parameter or Variable: TOTAL CARBON (calculated);
Units: average del13C;
Observation Category: laboratory analysis;
Sampling Instrument: isotope ration mass spectrometer;
Sampling and Analyzing Method: Average value of the ratio of 13C to 12C in total carbon (TC) in the sample in delta notation from duplicate analysis of subsamples. n.a.: not applicable as samples for this analysis were not collected.</gco:CharacterString>
              </gmd:description>
            </gmi:LE_ProcessStep>
          </gmd:processStep>
          <gmd:processStep>
            <gmi:LE_ProcessStep>
              <gmd:description>
                <gco:CharacterString>Parameter or Variable: TOTAL CARBON (calculated);
Units: standard deviation of del13C;
Observation Category: laboratory analysis;
Sampling Instrument: isotope ratio mass spectrometer;
Sampling and Analyzing Method: Standard deviation of the ratio of 13C to 12C in total carbon (TC) in the sample in delta notation from duplicate analysis of subsamples. n.a.: not applicable as samples for this analysis were not collected.</gco:CharacterString>
              </gmd:description>
            </gmi:LE_ProcessStep>
          </gmd:processStep>
        </gmd:LI_Lineage>
      </gmd:lineage>
    </gmd:DQ_DataQuality>
  </gmd:dataQualityInfo>
  <gmd:metadataMaintenance>
    <gmd:MD_MaintenanceInformation>
      <gmd:maintenanceAndUpdateFrequency>
        <gmd:MD_MaintenanceFrequencyCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#MD_MaintenanceFrequencyCode" codeListValue="asNeeded">asNeeded</gmd:MD_MaintenanceFrequencyCode>
      </gmd:maintenanceAndUpdateFrequency>
      <gmd:maintenanceNote>
        <gco:CharacterString>Metadata are developed, maintained and distributed by NCEI. Updates are performed as needed to maintain currentness.</gco:CharacterString>
      </gmd:maintenanceNote>
      <gmd:contact>
        <gmd:CI_ResponsibleParty>
          <gmd:organisationName>
            <gco:CharacterString>NOAA National Centers for Environmental Information</gco:CharacterString>
          </gmd:organisationName>
          <gmd:role>
            <gmd:CI_RoleCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#CI_RoleCode" codeListValue="custodian">custodian</gmd:CI_RoleCode>
          </gmd:role>
        </gmd:CI_ResponsibleParty>
      </gmd:contact>
    </gmd:MD_MaintenanceInformation>
  </gmd:metadataMaintenance>
  <gmi:acquisitionInformation>
    <gmi:MI_AcquisitionInformation id="AMS">
      <gmi:instrument>
        <gmi:MI_Instrument id="inst_be4a">
          <gmi:identifier>
            <gmd:MD_Identifier>
              <gmd:code>
                <gco:CharacterString>Flow Cytometer</gco:CharacterString>
              </gmd:code>
            </gmd:MD_Identifier>
          </gmi:identifier>
          <gmi:type>
            <gco:CharacterString>Flow Cytometer</gco:CharacterString>
          </gmi:type>
          <gmi:description>
            <gco:CharacterString>A method to enumerate bacterial and phytoplankton cells in seawater and estimate their spherical diameter

Flow cytometers are laboratory based instruments used to measure cells and particles from aqueous samples.  The instrument was initially developed for analysis of Human blood cells for medical purposes, but this technology was adopted by the ocean science community by several investigators, principally Penny Chischolm out of the Massachusetts Institute of Technology, in late 20th century.  Since then, the technique has been broadly applied, and it is a unique measurement of microbial populations in the ocean because it provides one at a time measures of cells, to extrapolate features such as fluorescence and cell size.  Flow cytometers have been adapted for a number of oceanographic applications such as ship board measurement, and more precise measurement of planktonic fractions.  Additionally, the flow cytometer has been adapted for in-situ deployment (see the corresponding nodc instrument code).</gco:CharacterString>
          </gmi:description>
        </gmi:MI_Instrument>
      </gmi:instrument>
      <gmi:instrument>
        <gmi:MI_Instrument id="inst_bef4">
          <gmi:identifier>
            <gmd:MD_Identifier>
              <gmd:code>
                <gco:CharacterString>oxygen sensor</gco:CharacterString>
              </gmd:code>
            </gmd:MD_Identifier>
          </gmi:identifier>
          <gmi:type>
            <gco:CharacterString>oxygen sensor</gco:CharacterString>
          </gmi:type>
          <gmi:description>
            <gco:CharacterString>Any instrument that measures oxygen content in a compound.</gco:CharacterString>
          </gmi:description>
        </gmi:MI_Instrument>
      </gmi:instrument>
      <gmi:instrument>
        <gmi:MI_Instrument id="inst_beaa">
          <gmi:identifier>
            <gmd:MD_Identifier>
              <gmd:code>
                <gco:CharacterString>sonar</gco:CharacterString>
              </gmd:code>
            </gmd:MD_Identifier>
          </gmi:identifier>
          <gmi:type>
            <gco:CharacterString>sonar</gco:CharacterString>
          </gmi:type>
          <gmi:description>
            <gco:CharacterString>sound/sonic navigation and ranging

Sonar (sound navigation and ranging or sonic navigation and ranging) is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, measure distances (ranging), communicate with or detect objects on or under the surface of the water, such as other vessels.

Side-scan sonar (also sometimes called side scan sonar, sidescan sonar, side imaging sonar, side-imaging sonar and bottom classification sonar) is a category of sonar system that is used to efficiently create an image of large areas of the sea floor.

[wikipedia]

Bio-acoustic Sonar measures acoustic signals of plankton and zooplankton.

[OOI]</gco:CharacterString>
          </gmi:description>
        </gmi:MI_Instrument>
      </gmi:instrument>
      <gmi:instrument>
        <gmi:MI_Instrument id="inst_be41">
          <gmi:identifier>
            <gmd:MD_Identifier>
              <gmd:code>
                <gco:CharacterString>temperature sensor</gco:CharacterString>
              </gmd:code>
            </gmd:MD_Identifier>
          </gmi:identifier>
          <gmi:type>
            <gco:CharacterString>temperature sensor</gco:CharacterString>
          </gmi:type>
          <gmi:description>
            <gco:CharacterString>A sensor used to measure temperature.</gco:CharacterString>
          </gmi:description>
        </gmi:MI_Instrument>
      </gmi:instrument>
      <gmi:platform>
        <gmi:MI_Platform id="plat_8af3">
          <gmi:identifier>
            <gmd:MD_Identifier>
              <gmd:code>
                <gco:CharacterString>E/V Nautilus</gco:CharacterString>
              </gmd:code>
            </gmd:MD_Identifier>
          </gmi:identifier>
          <gmi:description>
            <gco:CharacterString>Updated information from ICES for the vessel NAUTILUS from VC: SAINT VINCENT AND THE GRENADINES.

Name : NAUTILUS
Country(s) : VC: SAINT VINCENT AND THE GRENADINES (ISO Country Code)
Platform Class : 31: Research vessel
Call Sign : J8B3605
MMSI: 376404000
IMO : 6711883
Title : EV
Commissioned Date : 2009
Current Length : 64
Built : 1967
Previous Name (Notes): A.V.HUMBOLDT
WOD Code: 11786
Notes : Exploration vessel owned by the Ocean Exploration Trust. Equipped with ROVs. Built as GEORGIUS AGRICOLA (DDDE), became ALEXANDER v.HUMBOLDT in 1970, A.V.Humboldt from 1992 (DE), became FRANKLIN (AG) in 2004, became Alexander Von Humboldt (VC) in 2006, became A.v.HUMBOLDT in 2009, became NAUTILUS in 2009. Built as trawler, converted to RV in 1970-78.

Information Sources:
- https://www.oceanexplorationtrust.org/ev-nautilus
- https://en.wikipedia.org/wiki/EV_Nautilus
- https://www.marinetraffic.com/en/ais/details/ships/shipid:467893/mmsi:376404000/imo:6711883/vessel:NAUTILUS
- http://www.shipspotting.com/gallery/photo.php?lid=1455570
- http://www.shipspotting.com/gallery/photo.php?lid=1914941

Same Vessels Info:
07AL - A. V. HUMBOLDT
06VH - A. V. HUMBOLDT

General Comments:
Carries ROVs Hercules and Argus
IMO confirmed in Miramar and Equasis.
Not found in ITU.

Confirmed by NOAA on 2019-12-30. (FY2020)
Submitted to ICES 2019-07-09</gco:CharacterString>
          </gmi:description>
          <gmi:instrument gco:nilReason="missing" />
        </gmi:MI_Platform>
      </gmi:platform>
    </gmi:MI_AcquisitionInformation>
  </gmi:acquisitionInformation>
</gmi:MI_Metadata>