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    • EK60 Water Column Sonar Data Collected During RL1503

    Metadata Updated: March 1, 2025

    Multi-frequency (18-, 38-, 70-, 120-, and 200-kHz) General Purpose Transceivers (Simrad EK60 GPTs), were configured with split-beam transducers (Simrad ES18-11, ES38B, ES70-7C, ES120-7C, and ES200-7C, respectively). The transducers were mounted on the bottom of a retractable keel or “centerboard”. The keel was retracted (~ 5-m depth) during calibration, and extended to the intermediate position (~7-m depth) during the survey. Exceptions were made during shallow water operations, when the keel was retracted to ~ 5-m depth; or during times of heavy weather, when the keel was extended to ~9-m depth to provide extra stability and reduce the e˙ect of weather-generated noise.

    Final Spring 2015 Survey Report: https://repository.library.noaa.gov/view/noaa/15392

    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 February 26, 2025
    Metadata Created Date March 1, 2025
    Metadata Updated Date March 1, 2025
    Reference Date(s) March 28, 2015 (creation), February 26, 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 February 26, 2025
    Metadata Created Date March 1, 2025
    Metadata Updated Date March 1, 2025
    Reference Date(s) March 28, 2015 (creation), February 26, 2025 (publication)
    Responsible Party (Point of Contact); NOAA National Centers for Environmental Information (Point of Contact)
    Contact Email
    Guid gov.noaa.ncei:RL1503_EK60
    Access Constraints Cite as: NOAA Southwest Fisheries Science Center. 2025. EK60 Water Column Sonar Data Collected During RL1503. NOAA National Centers for Environmental Information. https://doi.org/10.25921/webt-rv25 [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 -121.04919
    Bbox North Lat 44.29435
    Bbox South Lat 34.67616
    Bbox West Long -126.53199
    Coupled Resource
    Frequency Of Update notPlanned
    Harvest Object Id 579cbc29-908e-4419-9bdb-ca94f04ee49d
    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 Calibrated w/ calibration data
    Metadata Language eng; USA
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": [[[-126.53199, 34.67616], [-121.04919, 34.67616], [-121.04919, 44.29435], [-126.53199, 44.29435], [-126.53199, 34.67616]]]}
    Progress completed
    Spatial Data Service Type
    Spatial Reference System urn:ogc:def:crs:EPSG::4326
    Spatial Harvester True
    Temporal Extent Begin 2015-03-28T00:00:00
    Temporal Extent End 2015-05-01T11:59:59

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