EK60 Water Column Sonar Data Collected During DY1203

Metadata Updated: November 12, 2020

Gulf of Alaska Acoustic-Trawl Surveys of Walleye Pollock (DY1203, 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 Gulf of Alaska (GOA) during the late winter/early spring of 2012 to estimate the distribution and abundance of walleye pollock (Theraga chalcogramma). The survey was conducted along the Gulf of Alaska shelf break east of Chrikof Island (17-19 March) and throughout the Shelikof sea valley (20-26 March). The vessel departed Kodiak, Alaska on 5 March for the start of cruise DY1202 and was at sea for the start of the Chirikof shelf break survey. The vessel conducted a personnel transfer in Kodiak on 19 March then proceeded to the Shelikof Strait survey area. A post-cruise EK60 echosounder system calibration was conducted on 26 March in Malina Bay, Afognak Island, Alaska and the vessel returned to Kodiak at the completion of the cruise on 27 March. 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.

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Dates

Metadata Date June 3, 2020
Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020
Reference Date(s) March 15, 2012 (creation), January 1, 2016 (publication)
Frequency Of Update notPlanned

Metadata Source

Harvested from NGDC MGG Sonar Water Column

Additional Metadata

Resource Type Series
Metadata Date June 3, 2020
Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020
Reference Date(s) March 15, 2012 (creation), January 1, 2016 (publication)
Responsible Party NOAA National Centers for Environmental Information (Point of Contact)
Contact Email
Guid gov.noaa.ngdc.mgg.wcd:DY1203_EK60
Access Constraints Cite as: Alaska Fisheries Science Center. 2012. 'EK60 Water Column Sonar Data Collected During DY1203'. NOAA National Centers for Environmental Information. doi:10.7289/V5QF8QWG [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 -152.08266
Bbox North Lat 58.50461
Bbox South Lat 53.96735
Bbox West Long -165.6079
Coupled Resource
Frequency Of Update notPlanned
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
Progress completed
Spatial Data Service Type
Spatial Reference System urn:ogc:def:crs:EPSG::4326
Spatial Harvester True
Temporal Extent Begin 2012-03-15T20:02:48
Temporal Extent End 2012-03-27T15:10:39

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