http://lod.bco-dmo.org/id/dataset/3518
eng; USA
utf8
dataset
Highest level of data collection, from a common set of sensors or instrumentation, usually within the same research project
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
2011-08-04
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
ODF CTD profiles along with US GEOTRACES North Atlantic Transect from the R/V Knorr KN199-04 cruise in the subtropical N Atlantic during 2010 (U.S. GEOTRACES NAT project)
2012-05-23
publication
2012-05-23
revision
Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)
2020-03-25
publication
https://doi.org/10.26008/1912/bco-dmo.3518.1
William J. Jenkins
Woods Hole Oceanographic Institution
principalInvestigator
Edward A. Boyle
Massachusetts Institute of Technology
principalInvestigator
Gregory A. Cutter
Old Dominion University
principalInvestigator
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
publisher
Cite this dataset as: Jenkins, W., Boyle, E., Cutter, G. (2020) ODF CTD profiles along with US GEOTRACES North Atlantic Transect from the R/V Knorr KN199-04 cruise in the subtropical N Atlantic during 2010 (U.S. GEOTRACES NAT project). Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2012-05-23 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.3518.1 [access date]
CTD - ODF/SIOR Profiles (1 m downcasts) Dataset Description: <p>CTD profile data from 30-ODF/SIOR (Ocean Data Facility 12 bottle, 30 liter Niskin rosette)<br />
1m Downcasts</p> Methods and Sampling: <p>(see individual deployments)</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-0926423 Award URL: http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=0926423
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-0926092 Award URL: http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=0926092
completed
William J. Jenkins
Woods Hole Oceanographic Institution
508-289-2554
266 Woods Hole Rd. MS#25
Woods Hole
MA
02543
USA
wjenkins@whoi.edu
pointOfContact
Edward A. Boyle
Massachusetts Institute of Technology
617-253-3388
Chemical Oceanography, Trace Metal Group MIT E25-619, 45 Carleton St
Cambridge
MA
02142
USA
eaboyle@mit.edu
pointOfContact
Gregory A. Cutter
Old Dominion University
757-683-4929
Department of Ocean, Earth, and Atmospheric Sciences 4500 Elkhorn Ave
Norfolk
VA
23529-0276
USA
gcutter@odu.edu
pointOfContact
asNeeded
Dataset Version: 1
Unknown
CRUISE_ID
GEOTRACES_CRUISE_ID
GEOTRC_EVENTNO
STNNBR
CASTNO
TYPE
DATE
TIME
LATITUDE
LONGITUDE
BTMDEPTH
CTDPRS
CTDPRS_FLAG_W
CTDTMP
CTDTMP_FLAG_W
CTDSAL
CTDSAL_FLAG_W
CTDOXY
CTDOXY_FLAG_W
TRANSM
TRANSM_FLAG_W
FLUORM
FLUORM_FLAG_W
DEPTH
DEPTH_FLAG_W
CTDNOBS
CTDETIME
lat_nom
lon_nom
Fluorometer
Transmissometer
CTD Sea-Bird SBE 911plus
Dissolved Oxygen Sensor
theme
None, User defined
cruise id
event
station
cast
cast type
date
time of day
latitude
longitude
depth_bottom
water pressure
flag
water temperature
salinity
dissolved Oxygen
light transmission (volts)
flvolt
depth
numb_obs
time_elapsed
latitude nominal
longitude nominal
featureType
BCO-DMO Standard Parameters
Fluorometer
Transmissometer
CTD Sea-Bird SBE 911plus
Dissolved Oxygen Sensor
instrument
BCO-DMO Standard Instruments
KN199-04
service
Deployment Activity
Subtropical northern Atlantic Ocean
place
Locations
otherRestrictions
otherRestrictions
Access Constraints: none. Use Constraints: Please follow guidelines at: http://www.bco-dmo.org/terms-use Distribution liability: Under no circumstances shall BCO-DMO be liable for any direct, incidental, special, consequential, indirect, or punitive damages that result from the use of, or the inability to use, the materials in this data submission. If you are dissatisfied with any materials in this data submission your sole and exclusive remedy is to discontinue use.
U.S. GEOTRACES
http://www.geotraces.org/
U.S. GEOTRACES
GEOTRACES is a SCOR sponsored program; and funding for program infrastructure development is provided by the U.S. National Science Foundation.
GEOTRACES gained momentum following a special symposium, S02: Biogeochemical cycling of trace elements and isotopes in the ocean and applications to constrain contemporary marine processes (GEOSECS II), at a 2003 Goldschmidt meeting convened in Japan. The GEOSECS II acronym referred to the Geochemical Ocean Section Studies To determine full water column distributions of selected trace elements and isotopes, including their concentration, chemical speciation, and physical form, along a sufficient number of sections in each ocean basin to establish the principal relationships between these distributions and with more traditional hydrographic parameters;
* To evaluate the sources, sinks, and internal cycling of these species and thereby characterize more completely the physical, chemical and biological processes regulating their distributions, and the sensitivity of these processes to global change; and
* To understand the processes that control the concentrations of geochemical species used for proxies of the past environment, both in the water column and in the substrates that reflect the water column.
GEOTRACES will be global in scope, consisting of ocean sections complemented by regional process studies. Sections and process studies will combine fieldwork, laboratory experiments and modelling. Beyond realizing the scientific objectives identified above, a natural outcome of this work will be to build a community of marine scientists who understand the processes regulating trace element cycles sufficiently well to exploit this knowledge reliably in future interdisciplinary studies.
Expand "Projects" below for information about and data resulting from individual US GEOTRACES research projects.
U.S. GEOTRACES
largerWorkCitation
program
U.S. GEOTRACES North Atlantic Transect (GA03)
https://www.geotraces.org/
U.S. GEOTRACES North Atlantic Transect (GA03)
<p><em>Much of this text appeared in an article published in OCB News, October 2008, by the OCB Project Office.</em></p>
<p>The first U.S. GEOTRACES Atlantic Section will be specifically centered around a sampling cruise to be carried out in the North Atlantic in 2010. Ed Boyle (MIT) and Bill Jenkins (WHOI) organized a three-day planning workshop that was held September 22-24, 2008 at the Woods Hole Oceanographic Institution. The main goal of the workshop, sponsored by the National Science Foundation and the U.S. GEOTRACES Scientific Steering Committee, was to design the implementation plan for the first U.S. GEOTRACES Atlantic Section. The primary cruise design motivation was to improve knowledge of the sources, sinks and internal cycling of Trace Elements and their Isotopes (TEIs) by studying their distributions along a section in the North Atlantic (Figure 1). The North Atlantic has the full suite of processes that affect TEIs, including strong meridional advection, boundary scavenging and source effects, aeolian deposition, and the salty Mediterranean Outflow. The North Atlantic is particularly important as it lies at the "origin" of the global Meridional Overturning Circulation.</p>
<p>It is well understood that many trace metals play important roles in biogeochemical processes and the carbon cycle, yet very little is known about their large-scale distributions and the regional scale processes that affect them. Recent advances in sampling and analytical techniques, along with advances in our understanding of their roles in enzymatic and catalytic processes in the open ocean provide a natural opportunity to make substantial advances in our understanding of these important elements. Moreover, we are motivated by the prospect of global change and the need to understand the present and future workings of the ocean's biogeochemistry. The GEOTRACES strategy is to measure a broad suite of TEIs to constrain the critical biogeochemical processes that influence their distributions. In addition to these "exotic" substances, more traditional properties, including macronutrients (at micromolar and nanomolar levels), CTD, bio-optical parameters, and carbon system characteristics will be measured. The cruise starts at Line W, a repeat hydrographic section southeast of Cape Cod, extends to Bermuda and subsequently through the North Atlantic oligotrophic subtropical gyre, then transects into the African coast in the northern limb of the coastal upwelling region. From there, the cruise goes northward into the Mediterranean outflow. The station locations shown on the map are for the "fulldepth TEI" stations, and constitute approximately half of the stations to be ultimately occupied.</p>
<p><em>Figure 1. The proposed 2010 Atlantic GEOTRACES cruise track plotted on dissolved oxygen at 400 m depth. Data from the World Ocean Atlas (Levitus et al., 2005) were plotted using Ocean Data View (courtesy Reiner Schlitzer). [click on the image to view a larger version]</em><br /><a href="/objectserver/86c47ca3173d90ef5edcec249de05aa6/GEOTRACES_Atl_stas.jpg?url=http%3A%2F%2Fbcodata.whoi.edu%2FUS_GEOTRACES%2FAtlanticSection%2FGEOTRACES_Atl_stas.jpg&f=3163653666383833383364633438646666303638356339386633613165393232687474703a2f2f62636f646174612e77686f692e6564752f55535f47454f5452414345532f41746c616e74696353656374696f6e2f47454f5452414345535f41746c5f737461732e6a7067" target="_blank"><img alt="" src="https://datadocs.bco-dmo.org/d2/US_GEOTRACES/AtlanticSection/GEOTRACES_Atl_stas.jpg" style="width:350px" /></a></p>
<p>Hydrography, CTD and nutrient measurements will be supported by the Ocean Data Facility (J. Swift) at Scripps Institution of Oceanography and funded through NSF Facilities. They will be providing an additional CTD rosette system along with nephelometer and LADCP. A trace metal clean Go-Flo Rosette and winch will be provided by the group at Old Dominion University (G. Cutter) along with a towed underway pumping system.</p>
<p>The North Atlantic Transect cruise began in 2010 with KN199 leg 4 (station sampling) and leg 5 (underway sampling only) (Figure 2).</p>
<p><a href="http://bcodata.whoi.edu//US_GEOTRACES/AtlanticSection/Cruise_Report_for_Knorr_199_Final_v3.pdf" target="_blank">KN199-04 Cruise Report (PDF)</a></p>
<p><em>Figure 2. The red line shows the cruise track for the first leg of the US Geotraces North Atlantic Transect on the R/V Knorr in October 2010. The rest of the stations (beginning with 13) will be completed in October-December 2011 on the R/V Knorr (courtesy of Bill Jenkins, Chief Scientist, GNAT first leg). [click on the image to view a larger version]</em><br /><a href="/objectserver/28028490f13f23fe63a08ff289a7cc8a/GNAT_stationPlan.jpg?url=http%3A%2F%2Fbcodata.whoi.edu%2FUS_GEOTRACES%2FAtlanticSection%2FGNAT_stationPlan.jpg&f=3837393231613337386638616637626663373565643337316231306231363634687474703a2f2f62636f646174612e77686f692e6564752f55535f47454f5452414345532f41746c616e74696353656374696f6e2f474e41545f73746174696f6e506c616e2e6a7067" target="_blank"><img alt="Atlantic Transect Station location map" src="https://datadocs.bco-dmo.org/d2/US_GEOTRACES/AtlanticSection/GNAT_stationPlan_sm.jpg" style="width:350px" /></a></p>
<p>The section completion effort resumed again in November 2011 with KN204-01A,B (Figure 3).</p>
<p><a href="http://bcodata.whoi.edu//US_GEOTRACES/AtlanticSection/Submitted_Preliminary_Cruise_Report_for_Knorr_204-01.pdf" target="_blank">KN204-01A,B Cruise Report (PDF)</a></p>
<p><em>Figure 3. Station locations occupied on the US Geotraces North Atlantic Transect on the R/V Knorr in November 2011. [click on the image to view a larger version]</em><br /><a href="/objectserver/008fd0c21f8a23724741e9c150458427/KN204-01_Stations.png?url=http%3A%2F%2Fbcodata.whoi.edu%2FUS_GEOTRACES%2FAtlanticSection%2FKN204-01_Stations.png&f=6633373930333834633833323933666666326139613061306266336237306638687474703a2f2f62636f646174612e77686f692e6564752f55535f47454f5452414345532f41746c616e74696353656374696f6e2f4b4e3230342d30315f53746174696f6e732e706e67" target="_blank"><img alt="Atlantic Transect/Part 2 Station location map" src="https://datadocs.bco-dmo.org/d2/US_GEOTRACES/AtlanticSection/KN204-01_Stations.png" style="width:350px" /></a></p>
<p>Data from the North Atlantic Transect cruises are available under the Datasets heading below, and consensus values for the SAFe and North Atlantic GEOTRACES Reference Seawater Samples are available from the GEOTRACES Program Office: <a href="http://www.geotraces.org/science/intercalibration/322-standards-and-reference-materials?acm=455_215" target="_blank">Standards and Reference Materials</a></p>
<p><strong>ADCP data</strong> are available from the Currents ADCP group at the University of Hawaii at the links below:<br /><a href="http://currents.soest.hawaii.edu/uhdas_adcp/year2010.html#kn199_4" target="_blank">KN199-04</a> (leg 1 of 2010 cruise; Lisbon to Cape Verde)<br /><a href="http://currents.soest.hawaii.edu/uhdas_adcp/year2010.html#kn199_5" target="_blank">KN199-05</a> (leg 2 of 2010 cruise; Cape Verde to Charleston, NC)<br /><a href="http://currents.soest.hawaii.edu/uhdas_adcp/year2011.html#kn204_01" target="_blank">KN204-01A</a> (part 1 of 2011 cruise; Woods Hole, MA to Bermuda)<br /><a href="http://currents.soest.hawaii.edu/uhdas_adcp/year2011.html#kn204_02" target="_blank">KN204-01B</a> (part 2 of 2011 cruise; Bermuda to Cape Verde)</p>
U.S. GEOTRACES NAT
largerWorkCitation
project
eng; USA
oceans
Subtropical northern Atlantic Ocean
-24.4998
-9.66001
17.34906
38.33036
2010-10-16
2010-11-02
Subtropical western and eastern North Atlantic Ocean (GA03)
0
BCO-DMO catalogue of parameters from ODF CTD profiles along with US GEOTRACES North Atlantic Transect from the R/V Knorr KN199-04 cruise in the subtropical N Atlantic during 2010 (U.S. GEOTRACES NAT project)
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
http://lod.bco-dmo.org/id/dataset-parameter/27881.rdf
Name: CRUISE_ID
Units: text
Description: Official Cruise Id
http://lod.bco-dmo.org/id/dataset-parameter/27882.rdf
Name: GEOTRACES_CRUISE_ID
Units: text
Description: GEOTRACES Cruise Id
http://lod.bco-dmo.org/id/dataset-parameter/27883.rdf
Name: GEOTRC_EVENTNO
Units: integer
Description: GEOTRACES Event Number
http://lod.bco-dmo.org/id/dataset-parameter/27884.rdf
Name: STNNBR
Units: integer
Description: Station Number
http://lod.bco-dmo.org/id/dataset-parameter/27885.rdf
Name: CASTNO
Units: integer
Description: Cast Number
http://lod.bco-dmo.org/id/dataset-parameter/27886.rdf
Name: TYPE
Units: text
Description: Cast Type
http://lod.bco-dmo.org/id/dataset-parameter/27887.rdf
Name: DATE
Units: unitless
Description: Date in the format YYYYMMDD
http://lod.bco-dmo.org/id/dataset-parameter/27888.rdf
Name: TIME
Units: HHMMSS
Description: Time
http://lod.bco-dmo.org/id/dataset-parameter/27889.rdf
Name: LATITUDE
Units: DEGREES
Description: Latitude (South is negative)
http://lod.bco-dmo.org/id/dataset-parameter/27890.rdf
Name: LONGITUDE
Units: DEGREES
Description: Longitude (West is negative)
http://lod.bco-dmo.org/id/dataset-parameter/27891.rdf
Name: BTMDEPTH
Units: CORR METERS
Description: Bottom Depth
http://lod.bco-dmo.org/id/dataset-parameter/27892.rdf
Name: CTDPRS
Units: DBAR
Description: CTD Pressure
http://lod.bco-dmo.org/id/dataset-parameter/27893.rdf
Name: CTDPRS_FLAG_W
Units: integer
Description: CTD Pressure Flag W
http://lod.bco-dmo.org/id/dataset-parameter/27894.rdf
Name: CTDTMP
Units: ITS-90
Description: CTD Temperature
http://lod.bco-dmo.org/id/dataset-parameter/27895.rdf
Name: CTDTMP_FLAG_W
Units: integer
Description: CTD Temperature Flag W
http://lod.bco-dmo.org/id/dataset-parameter/27896.rdf
Name: CTDSAL
Units: PSS-78
Description: CTD Salinity
http://lod.bco-dmo.org/id/dataset-parameter/27897.rdf
Name: CTDSAL_FLAG_W
Units: integer
Description: CTD Salinity Flag W
http://lod.bco-dmo.org/id/dataset-parameter/27898.rdf
Name: CTDOXY
Units: UMOL/KG
Description: CTD Oxygen
http://lod.bco-dmo.org/id/dataset-parameter/27899.rdf
Name: CTDOXY_FLAG_W
Units: integer
Description: CTD Oxygen Flag W
http://lod.bco-dmo.org/id/dataset-parameter/27900.rdf
Name: TRANSM
Units: 0-5VDC
Description: Transmissometer
http://lod.bco-dmo.org/id/dataset-parameter/27901.rdf
Name: TRANSM_FLAG_W
Units: integer
Description: Transmissometer Flag W
http://lod.bco-dmo.org/id/dataset-parameter/27902.rdf
Name: FLUORM
Units: 0-5VDC
Description: Fluorometer
http://lod.bco-dmo.org/id/dataset-parameter/27903.rdf
Name: FLUORM_FLAG_W
Units: integer
Description: Fluorometer Flag W
http://lod.bco-dmo.org/id/dataset-parameter/27904.rdf
Name: DEPTH
Units: METERS
Description: Depth
http://lod.bco-dmo.org/id/dataset-parameter/27905.rdf
Name: DEPTH_FLAG_W
Units: integer
Description: Depth Flag W
http://lod.bco-dmo.org/id/dataset-parameter/27906.rdf
Name: CTDNOBS
Units: integer
Description: CTD Number Observations
http://lod.bco-dmo.org/id/dataset-parameter/27907.rdf
Name: CTDETIME
Units: SECONDS
Description: CTD Elapsed Time
http://lod.bco-dmo.org/id/dataset-parameter/32813.rdf
Name: lat_nom
Units: decimal degrees
Description: Nominal latitude of station. Obtained from KN199-04 station waypoints provided by Chief Sci.
http://lod.bco-dmo.org/id/dataset-parameter/32814.rdf
Name: lon_nom
Units: decimal degrees
Description: Nominal longitude of station. Obtained from KN199-04 station waypoints provided by Chief Sci.
GB/NERC/BODC > British Oceanographic Data Centre, Natural Environment Research Council, United Kingdom
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
9687703
https://darchive.mblwhoilibrary.org/bitstream/1912/25573/1/dataset-3518_gt10-ctd-odfsior-profiles__v1.tsv
download
https://doi.org/10.26008/1912/bco-dmo.3518.1
download
onLine
dataset
<p>(see individual deployments)</p>
from Cruise: KN199-04 <p>Refer to <a href="http://bcodata.whoi.edu//US_GEOTRACES/AtlanticSection/Cruise_Report_for_Knorr_199_Final_v3.pdf" target="_blank">KN199-04 Cruise Report</a> for detailed descriptions of acquisition and processing methodologies</p>
Specified by the Principal Investigator(s)
<p>(see individual deployments)</p>
from Cruise: KN199-04 <p>Refer to <a href="http://bcodata.whoi.edu//US_GEOTRACES/AtlanticSection/Cruise_Report_for_Knorr_199_Final_v3.pdf" target="_blank">KN199-04 Cruise Report</a> for detailed descriptions of acquisition and processing methodologies</p>
Specified by the Principal Investigator(s)
asNeeded
7.x-1.1
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
Fluorometer
Fluorometer
PI Supplied Instrument Name: Fluorometer PI Supplied Instrument Description:Fluormeter Instrument Name: Fluorometer Instrument Short Name:Fluorometer Instrument Description: A fluorometer or fluorimeter is a device used to measure parameters of fluorescence: its intensity and wavelength distribution of emission spectrum after excitation by a certain spectrum of light. The instrument is designed to measure the amount of stimulated electromagnetic radiation produced by pulses of electromagnetic radiation emitted into a water sample or in situ. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/113/
Transmissometer
Transmissometer
PI Supplied Instrument Name: Transmissometer PI Supplied Instrument Description:Transmissometer Instrument Name: Transmissometer Instrument Short Name:Transmissometer Instrument Description: A transmissometer measures the beam attenuation coefficient of the lightsource over the instrument's path-length. This instrument designation is used when specific manufacturer, make and model are not known. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/124/
CTD Sea-Bird SBE 911plus
CTD Sea-Bird SBE 911plus
PI Supplied Instrument Name: CTD Sea-Bird SBE 911plus Instrument Name: CTD Sea-Bird SBE 911plus Instrument Short Name:CTD SBE 911plus Instrument Description: The Sea-Bird SBE 911 plus is a type of CTD instrument package for continuous measurement of conductivity, temperature and pressure. The SBE 911 plus includes the SBE 9plus Underwater Unit and the SBE 11plus Deck Unit (for real-time readout using conductive wire) for deployment from a vessel. The combination of the SBE 9 plus and SBE 11 plus is called a SBE 911 plus. The SBE 9 plus uses Sea-Bird's standard modular temperature and conductivity sensors (SBE 3 plus and SBE 4). The SBE 9 plus CTD can be configured with up to eight auxiliary sensors to measure other parameters including dissolved oxygen, pH, turbidity, fluorescence, light (PAR), light transmission, etc.). more information from Sea-Bird Electronics Community Standard Description: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0058/
Dissolved Oxygen Sensor
Dissolved Oxygen Sensor
PI Supplied Instrument Name: Dissolved Oxygen Sensor PI Supplied Instrument Description:Dissolved Oxygen Sensor Instrument Name: Dissolved Oxygen Sensor Instrument Short Name:Dissolved Oxygen Sensor Instrument Description: An electronic device that measures the proportion of oxygen (O2) in the gas or liquid being analyzed
Cruise: KN199-04
KN199-04
R/V Knorr
Community Standard Description
International Council for the Exploration of the Sea
R/V Knorr
vessel
KN199-04
William J. Jenkins
Woods Hole Oceanographic Institution
http://bcodata.whoi.edu/US_GEOTRACES/AtlanticSection/Cruise_Report_for_Knorr_199_Final_v3.pdf
Report describing KN199-04
R/V Knorr
Community Standard Description
International Council for the Exploration of the Sea
R/V Knorr
vessel