Gulf of Alaska Acoustic-Trawl Survey of Walleye Pollock (DY1506, ME70)

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 in the Gulf of Alaska (GOA) during late spring and summer of 2015 to estimate the distribution and abundance of walleye pollock (Gadus chalcogrammus). The survey area included the GOA shelf from the Islands of Four Mountains to Chiniak Trough including many associated bays and troughs. The survey was conducted from June 11 to August 16, 2015 in three legs, starting and ending in Kodiak, Alaska, with intermediate port calls in Kodiak, Alaska. The survey was conducted aboard NOAA Ship Oscar Dyson, a 64 meter stern trawler equipped with acoustic and oceanographic instrumentation, and biological sampling capabilities. The primary instrumentation for the survey was a Simrad EK60 split-beam echosounder system utilizing five frequencies (18, 38, 70, 120, and 200 kHz) and a Simrad ME70 multibeam echosounder, with the ME70 trigger synchronized to the EK60 system.
  • Cite as: Alaska Fisheries Science Center (2015): Water Column Sonar Data Collection (DY1506, ME70). National Centers for Environmental Information, NOAA. doi:10.7289/V5V69GKR [access date]
gov.noaa.ngdc.mgg.wcd:DY1506_ME70
Search Data
Distribution Formats
  • Simrad ME70 raw (.raw) format (Version: 1)
    • File Specification: Simrad ME70 raw files. See the Simrad ME70 interface specification manual for additional information.
Ordering Instructions Contact the NCEI Water Column Sonar Data Manager to order data
Distributor Chuck Anderson
Water Column Sonar Data Manager
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
(303) 497-4742
wcd.info@noaa.gov
Dataset No POCs available for this dataset
Time Period 2015-06-11T21:38:37 to 2015-08-16T00:00:00
Spatial Reference System urn:ogc:def:crs:EPSG:4326
Spatial Bounding Box Coordinates
N: 59.9587932866569
S: 52.3830553056981
E: -140.55244565053
W: -170.036871558254
Spatial Coverage Map
Documentation links not available.
Publication Dates
  • creation: 2015-06-11
Dataset Progress Status Complete - production of the data has been completed
Data Update Frequency Not planned
Purpose Acoustic-trawl (AT) survey of walleye pollock (Gadus chalcogrammus) in the Gulf of Alaska
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 (2015): Water Column Sonar Data Collection (DY1506, ME70). National Centers for Environmental Information, NOAA. doi:10.7289/V5V69GKR [access date]
Resource Providers
  • DOC/NOAA/NMFS/AFSC > Alaska Fisheries Science Center
Points of Contact
  • DOC/NOAA/NMFS/AFSC > Alaska Fisheries Science Center
Publishers
  • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
Theme 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)
  • Gulf of Alaska
Global Change Master Directory (GCMD) Location Keywords
  • GEOGRAPHIC REGION > GLOBAL
  • Vertical Location > VERTICAL LOCATION > SEA FLOOR
Use Constraints
  • Cite as: Alaska Fisheries Science Center (2015): Water Column Sonar Data Collection (DY1506, ME70). National Centers for Environmental Information, NOAA. doi:10.7289/V5V69GKR [access date]
Access Constraints
  • Resource may not be available for up to one year after initial collection.
Fees
  • Free
Lineage information for: collectionHardware
Lineage Statement Calibrated w/ calibration data
Lineage information for: series
Lineage information for: series
Lineage Statement The Simrad ME70 was operated opportunistically for research project work during cruise DY1506. Gaps in ME70 data occurred when the ME70 created crosstalk interference with the EK60 echosounder system and was secured. The ME70 transmit trigger was synchronized to the EK60 transmit ping.
Acquisition Information (collection)
Instrument
  • Simrad ME70
  • Simrad ES60
  • Knudsen CHIRP 3260
  • SBE 49 FastCAT
  • SBE 32
  • POS/MV 320
Platform
  • Oscar Dyson (DY)
Operation
  • DY1506_Leg1_ME70
Last Modified: 2017-05-30
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