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    • MS70 Water Column Sonar Data Collected During RL1706

    Metadata Updated: April 1, 2025

    During summer 2017, the west coasts of the United States and Vancouver Island, Canada, were surveyed using Lasker during the feeding seasons of sardine and anchovy. The survey departed from San Diego, transited to the northern end of Vancouver Island and sampled southward. Compulsory transects were nearly perpendicular to the coast with nominal separations of 20 nmi in most areas and with nominal separations of 10 nmi in areas where CPS were observed acoustically, in trawl catches, or both. The transect positions also covered much of the potential habitat of sardine at the time of the survey. The survey spanned an area from approximately Cape Scott, British Columbia (northern end of Vancouver Island) to Point Conception, with 105 east-west transects totaling 3540 nmi, and 83 Nordic trawls.

    Multi-frequency (18, 38, 70, 120, 200, and 333 kHz) General Purpose Transceivers (Simrad EK60 GPTs) and Wideband Transceivers (Simrad EK80 WBTs) were configured with split-beam transducers (Simrad ES18-11, ES38B, ES70-7C, ES120-7C, ES200-7C, and ES333-7C, respectively). The transducers were mounted on the bottom of a retractable keel or “centerboard”. The keel was retracted (transducers ~5-m depth) during calibration, and extended to the intermediate position (transducers ~7-m depth) during the survey. Exceptions were made during shallow water operations, when the keel was retracted; or during times of heavy weather, when the keel was extended (transducers ~9-m depth) to provide extra stability and reduce the effect of weather-generated noise.In addition, acoustic data were also collected using an ME70 multibeam echosounder (Simrad) and MS70 multibeam sonar (Simrad).

    Final Summer 2017 Survey Report: https://repository.library.noaa.gov/view/noaa/17367 Final Summer 2017 Biomass Report: https://repository.library.noaa.gov/view/noaa/19808

    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 March 7, 2025
    Metadata Created Date April 1, 2025
    Metadata Updated Date April 1, 2025
    Reference Date(s) June 19, 2017 (creation), March 7, 2025 (publication)
    Frequency Of Update notPlanned

    Metadata Source

    Harvested from NGDC MGG Sonar Water Column

    Other Data Resources

    Additional Metadata

    Resource Type Series
    Metadata Date March 7, 2025
    Metadata Created Date April 1, 2025
    Metadata Updated Date April 1, 2025
    Reference Date(s) June 19, 2017 (creation), March 7, 2025 (publication)
    Responsible Party (Point of Contact); NOAA National Centers for Environmental Information (Point of Contact)
    Contact Email
    Guid gov.noaa.ncei:RL1706_MS70
    Access Constraints Cite as: NOAA Southwest Fisheries Science Center. 2025. MS70 Water Column Sonar Data Collected During RL1706. NOAA National Centers for Environmental Information. https://doi.org/10.25921/ebjf-9a57 [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 -117.15302
    Bbox North Lat 50.69103
    Bbox South Lat 32.62463
    Bbox West Long -129.03935
    Coupled Resource
    Frequency Of Update notPlanned
    Harvest Object Id 23bf55d0-68d5-4971-ac8a-b30ff3a1c040
    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.
    Lineage Uncalibrated
    Metadata Language eng; USA
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": [[[-129.03935, 32.62463], [-117.15302, 32.62463], [-117.15302, 50.69103], [-129.03935, 50.69103], [-129.03935, 32.62463]]]}
    Progress completed
    Spatial Data Service Type
    Spatial Reference System urn:ogc:def:crs:EPSG::4326
    Spatial Harvester True
    Temporal Extent Begin 2017-06-19T00:00:00
    Temporal Extent End 2017-08-11T11:59:59

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