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EK60 Water Column Sonar Data Collected During DY0904

Metadata Updated: September 17, 2021

Acoustic-Trawl Surveys of Walleye Pollock in the Central Gulf of Alaska (DY0904, EK60). The Midwater Assessment and Conservation Engineering (MACE) program of NOAA National Marine Fisheries Service (NMFS), Alaska Fisheries Science Center (AFSC) conducted acoustic-trawl (AT) stock assessment surveys in the central Gulf of Alaska (GOA) during the late winter/early spring of 2009 to estimate the distribution and abundance of walleye pollock (Theragra chalcogramma). The vessel departed Kodiak, Alaska on 19 March and conducted a survey along the central Gulf of Alaska shelf east of Chirikof Island 20-22 March. The vessel then surveyed Shelikof Strait 23-28 March and performed an acoustic equipment calibration on 29 March. The Marmot Bay survey was conducted 29-30 March followed by fisheries research equipment testing on 31 March. The vessel ended the cruise in Kodiak, Alaska on 1 April. The survey was conducted aboard NOAA Ship Oscar Dyson, a 64 meter stern trawler equipped with acoustic and oceanographic instrumentation.

Access & Use Information

License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources

Dates

Metadata Date September 14, 2021
Metadata Created Date November 12, 2020
Metadata Updated Date September 17, 2021
Reference Date(s) March 19, 2009 (creation), October 3, 2016 (publication)
Frequency Of Update notPlanned

Metadata Source

Harvested from NGDC MGG Sonar Water Column

Additional Metadata

Resource Type Series
Metadata Date September 14, 2021
Metadata Created Date November 12, 2020
Metadata Updated Date September 17, 2021
Reference Date(s) March 19, 2009 (creation), October 3, 2016 (publication)
Responsible Party NOAA National Centers for Environmental Information (Point of Contact)
Contact Email
Guid gov.noaa.ngdc.mgg.wcd:DY0904_EK60
Access Constraints Cite as: Alaska Fisheries Science Center. 2009. 'EK60 Water Column Sonar Data Collected During DY0904'. NOAA National Centers for Environmental Information. doi:10.7289/V5SQ8XGZ [access date], 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., 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., Resource may not be available for up to one year after initial collection.
Bbox East Long -151.67431
Bbox North Lat 58.39257
Bbox South Lat 55.53438
Bbox West Long -156.83159
Coupled Resource
Frequency Of Update notPlanned
Harvest Object Id 1dc6378b-8135-489a-8c96-a5e51e4306ff
Harvest Source Id ab8b0290-e4db-4a00-89f2-4e427c2054b2
Harvest Source Title NGDC MGG Sonar Water Column
Licence 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., Not subject to copyright protection within the United States.
Metadata Language eng; USA
Metadata Type geospatial
Old Spatial {"type": "Polygon", "coordinates": [[[-156.83159, 55.53438], [-151.67431, 55.53438], [-151.67431, 58.39257], [-156.83159, 58.39257], [-156.83159, 55.53438]]]}
Progress completed
Spatial Data Service Type
Spatial Reference System urn:ogc:def:crs:EPSG::4326
Spatial Harvester True
Temporal Extent Begin 2009-03-19T20:37:19
Temporal Extent End 2009-04-01T14:31:39

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