Acoustic-Trawl Survey of Walleye Pollock on the U.S. and Russian Bering Sea Shelf (DY1207, EK60)

The Midwater Assessment and Conservation Engineering (MACE) program of NOAA National Marine Fisheries Service (NMFS), Alaska Fisheries Science Center (AFSC) conducted an acoustic-trawl (AT) stock assessment survey on the U.S. and Russian Bering Sea shelf during late spring/summer of 2012 to estimate the distribution and abundance of walleye pollock (Theraga chalcogramma). The survey was conducted from Bristol Bay, eastern Bering Sea in the U.S. to Cape Navarin, Russia, 7 June to 10 August aboard NOAA Ship Oscar Dyson, a 64 meter stern trawler equipped with acoustic and oceanographic instrumentation. The vessel departed Dutch Harbor, Alaska on 7 June and returned to Dutch Harbor on 10 August. The cruise was completed in three legs (leg 1, 7-25 June; leg 2, 30 June to 18 July; leg 3, 23 July to 10 August), with all port calls in Dutch Harbor, Alaska. The EK60 echosounder system was calibrated prior to and at the end of the cruise in Captains Bay, Dutch Harbor, Alaska.

Dataset Citation

Cite as: Alaska Fisheries Science Center (2012): Water Column Sonar Data Collection (DY1207, EK60). National Centers for Environmental Information, NOAA. doi:10.7289/V5V40S4J [access date]

Dataset Identifiers

DY1207_EK60
doi:10.7289/V5V40S4J

ISO 19115-2 Metadata

gov.noaa.ngdc.mgg.wcd:DY1207_EK60

XML


Search Data	Water Column Sonar Data Map Viewer (search) Interactive map viewer to allow discovery and access to water column sonar data
Distribution Formats	Simrad EK60 raw (.raw) format(Version:1) File Specification: Simrad EK60 raw files. See the Simrad EK60 interface specification manual for additional information.
Ordering Instructions	Contact the NCEI Water Column Sonar Data Manager to order data
Distributor	Water Column Sonar Data Manager NOAA National Centers for Environmental Information (303) 497-4742 wcd.info@noaa.gov
Dataset Principal Investigator	Chris Wilson Supervisory Research Fish Biologist DOC/NOAA/NMFS/AFSC > Alaska Fisheries Science Center (206) 526-6435 chris.wilson@noaa.gov


Time Period	2012-06-07T18:33:33 to 2012-08-10T00:00:00
Spatial Reference System	urn:ogc:def:crs:EPSG:4326
Spatial Bounding Box Coordinates	West:-175.768444539526 East:-162.158528147766 South:53.851372577943 North:61.3415035096933
Spatial Coverage Map


Documentation links not available.


Publication Dates	creation: 2012-06-07
Dataset Progress Status	Complete - production of the data has been completed
Data Update Frequency	Not planned
Purpose	Acoustic-trawl (AT) survey of walleye pollock (Theraga chalcogramma) on the U.S. and Russian Bering Sea shelf, 7 June to 10 August 2012
Use Limitations	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.


Dataset Citation	Cite as: Alaska Fisheries Science Center (2012): Water Column Sonar Data Collection (DY1207, EK60). National Centers for Environmental Information, NOAA. doi:10.7289/V5V40S4J [access date]
Custodians	NOAA National Centers for Environmental Information
Resource Providers	DOC/NOAA/NMFS/AFSC > Alaska Fisheries Science Center
Points of Contact	DOC/NOAA/NMFS/AFSC > Alaska Fisheries Science Center
Publishers	NOAA National Centers for Environmental Information


Theme keywords	Global Change Master Directory (GCMD) Science Keywords Earth Science > Oceans > Ocean Acoustics > Acoustic Scattering Earth Science > Oceans > Aquatic Sciences > Fisheries Earth Science > Oceans > Ocean Acoustics Earth Science > Biosphere > Ecosystems > Marine Ecosystems > Pelagic Earth Science > Biosphere > Ecosystems > Marine Ecosystems Earth Science > Biosphere > Ecosystems > Marine Ecosystems > Benthic Earth Science > Biosphere > Ecosystems > Aquatic Ecosystems Earth Science > Oceans > Bathymetry/Seafloor Topography > Bathymetry Earth Science > Oceans > Bathymetry/Seafloor Topography > Seafloor Topography
Data Center keywords	Global Change Master Directory (GCMD) Data Center Keywords DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce DOC/NOAA/NMFS > National Marine Fisheries Service, NOAA, U.S. Department of Commerce
Instrument keywords	Global Change Master Directory (GCMD) Instrument Keywords In Situ/Laboratory Instruments > Profilers/Sounders > Acoustic Sounders > WCMS > Water Column Mapping System
Place keywords	International Hydrographic Organization (IHO) Sea Area ("Limits of Oceans and Seas" publication S-23) Bering Sea Global Change Master Directory (GCMD) Location Keywords GEOGRAPHIC REGION > GLOBAL Vertical Location > VERTICAL LOCATION > SEA FLOOR


Use Constraints	Cite as: Alaska Fisheries Science Center (2012): Water Column Sonar Data Collection (DY1207, EK60). National Centers for Environmental Information, NOAA. doi:10.7289/V5V40S4J [access date]
Access Constraints	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. Resource may not be available for up to one year after initial collection.
Fees	Free

Use Constraints

Cite as: Alaska Fisheries Science Center (2012): Water Column Sonar Data Collection (DY1207, EK60). National Centers for Environmental Information, NOAA. doi:10.7289/V5V40S4J [access date]

Access Constraints

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.

Resource may not be available for up to one year after initial collection.

Fees

Free

Lineage information for:series
Processor	DOC/NOAA/NMFS/AFSC > Alaska Fisheries Science Center

Lineage information for:series
Lineage Statement	The primary instrument for the survey was a Simrad EK60 split-beam echosounder system utilizing five frequencies (18, 38, 70, 120, and 200 kHz). The EK60 transducers installed on the Oscar Dyson are mounted on a deployable centerboard. The transducer draft settings in the EK60 software are nominally correct when the centerboard is fully extended (draft correction setting is 9.15 meters below the surface). When the centerboard is in the retracted position (transducers approximately flush with the vessel's keel), the transducers are nominally 6.1 meters below the surface. The EK60 echosounder system was calibrated at the start of the cruise, 7-8 June 2012, and at the end of the cruise, 10 August 2012; both calibrations were conducted in Captains Bay, Dutch Harbor, Alaska.

Acquisition Information (collection)
Instrument	Simrad EK60 Simrad ME70 Simrad EK60 Simrad ES60 Knudsen CHIRP 3260 Sippican XBT/XSV SBE 49 FastCAT SBE 911plus CTD SBE 32 POS/MV 320
Platform	Oscar Dyson (DY)
Operation	DY1207_Leg1_EK60

Last Modified: 2017-05-30

For questions about the information on this page, please email:wcd.info@noaa.gov