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EK60 Water Column Sonar Data Collected During DY1407

Metadata Updated: September 17, 2021

Acoustic-Trawl Survey of Walleye Pollock on the Eastern Bering Sea Shelf (DY1407, EK60). National Marine Fisheries Service (NMFS), Alaska Fisheries Science Center (AFSC) conducted an acoustic-trawl (AT) stock assessment survey on the eastern Bering Sea shelf during late spring/summer of 2014 to estimate the distribution and abundance of walleye pollock (Gadus chalcogrammus). The survey was conducted from Bristol Bay in the U.S. to Cape Navarin, RusThe Midwater Assessment and Conservation Engineering (MACE) program of NOAA sia, 12 June to 13 August aboard NOAA Ship Oscar Dyson, a 64 meter stern trawler equipped with acoustic and oceanographic instrumentation. The vessel departed Dutch Harbor, Alaska on 12 June and returned to Dutch Harbor on 13 August. The cruise was completed in three legs (leg 1, 12-30 June; leg 2, 4-22 July; leg 3, 26 July to 13 August), with all port calls in Dutch Harbor, Alaska. The primary instrument for the survey was a Simrad EK60 split-beam echosounder system utilizing five frequencies (18, 38, 70, 120, and 200 kHz).

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) June 12, 2014 (creation), March 28, 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) June 12, 2014 (creation), March 28, 2016 (publication)
Responsible Party NOAA National Centers for Environmental Information (Point of Contact)
Contact Email
Guid gov.noaa.ngdc.mgg.wcd:DY1407_EK60
Access Constraints Cite as: Alaska Fisheries Science Center. 2014. 'EK60 Water Column Sonar Data Collected During DY1407'. NOAA National Centers for Environmental Information. doi:10.7289/V58S4MVP [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 -162.017806641321
Bbox North Lat 60.7943561658628
Bbox South Lat 53.8519811360906
Bbox West Long -174.231003371756
Coupled Resource
Frequency Of Update notPlanned
Harvest Object Id da96e212-3704-4f31-ad8c-7cf50332d4f0
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": [[[-174.231003372, 53.8519811361], [-162.017806641, 53.8519811361], [-162.017806641, 60.7943561659], [-174.231003372, 60.7943561659], [-174.231003372, 53.8519811361]]]}
Progress completed
Spatial Data Service Type
Spatial Reference System urn:ogc:def:crs:EPSG::4326
Spatial Harvester True
Temporal Extent Begin 2014-06-12T11:38:30
Temporal Extent End 2014-08-13T15:01:02

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