gov.noaa.ncei:RL2206_MS70 eng; USA utf8 series Water Column Sonar Series-Level Metadata NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact NCEI Contact Information Information for contacts at NCEI. information pointOfContact 2026-01-15 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) curve 1124 World Geodetic System 1984 WGS 84 2007-08-27 revision https://epsg.org/crs_4326/WGS-84.html WGS 84 GML of World Geodetic System 1984 coordinate reference system. information resourceProvider European Petroleum Survey Group https://epsg.org/home.html European Petroleum Survey Group Geodetic Parameter Registry Registry that accesses the EPSG Geodetic Parameter Dataset, which is a structured dataset of Coordinate Reference Systems and Coordinate Transformations. search publisher urn:ogc:def:crs:EPSG::4326 Vertical Datum: Unknown Vertical Datum: Unknown MS70 Water Column Sonar Data Collected During RL2206 2022-06-27 creation 2026-01-12 publication NOAA National Centers for Environmental Information RL2206_MS70 International DOI Foundation (IDF) doi:10.25921/c3e6-8781 NOAA National Centers for Environmental Information NCEI Metadata ID:RL2206_MS70_ME70 NOAA National Centers for Environmental Information custodian NOAA National Centers for Environmental Information publisher David Demer NMFS/SWFSC AST Supervisor/Senior Scientist 858-546-5603 8901 La Jolla Shores Drive La Jolla CA 92037 USA david.demer@noaa.gov principalInvestigator NOAA National Marine Fisheries Service Southwest Fisheries Science Center 858-546-7000 8901 La Jolla Shores Dr. La Jolla CA 92037 USA author This report provides: 1) a detailed description of the acoustic-trawl method (ATM) used by NOAA’s Southwest Fisheries Science Center for direct assessments of the dominant coastal pelagic species (CPS; i.e.: Pacifc Sardine Sardinops sagax, Northern Anchovy Engraulis mordax, Pacifc Mackerel Scomber japonicus, Jack Mackerel Trachurus symmetricus, and Pacifc Herring Clupea pallasii in the California Current Ecosystem of the west coast of the United States (U.S.) and portions of Baja CA, Mexico (MX); and 2) estimates of the biomasses, distributions, and demographics of those CPS encountered in the survey area between 27 June and 30 September 2022. The core region transects were perpendicular to the coast, extending from the shallowest navigable depth (~20 m) to either a distance of 35 nmi or to the 1,000 ftm isobath, whichever was farthest. Compulsory transects were spaced 10 nmi-apart in areas of historic CPS abundance (e.g., between Cape Flattery and Newport, and between San Francisco and San Diego) and 20-nmi apart elsewhere. When CPS were observed within the westernmost 3 nmi of a transect, that transect and the next one to the south were extended in 5-nmi increments until no CPS were observed in the last 3 nmi of the extension, to a maximum extension of 50 nmi. If a transect was extended, the ensuing transect was extended by the same amount. Multi-frequency Wide-Bandwidth Transceivers (18-, 38-, 70-, 120-, 200-, and 333-kHz Simrad EK80 WBTs; Kongsberg) were confgured with split-beam transducers (Simrad ES18-11, ES38B, ES70-7C, ES120-7C, ES200-7C, and ES333-7C, respectively; Kongsberg). The transducers were mounted on the bottom of a retractable keel or “centerboard”. The keel was retracted (transducers at ~5-m depth) during calibration, and extended to the intermediate position (transducers at ~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 at ~9-m depth) to provide extra stability and reduce the efect of weather-generated noise. In addition, acoustic data were also collected using a multibeam echosounder (Simrad ME70; Kongsberg), multibeam sonar (Simrad MS70; Kongsberg), scanning sonar (Simrad SX90; Kongsberg), acoustic Doppler current profler and echosounder (Simrad EC150-3C, Kongsberg), and a separate ADCP (Ocean Surveyor OS75; Teledyne RD Instruments). Transducer position and motion were measured at 5 Hz using an inertial motion unit (Applanix POS-MV; Trimble). This document, and references herein, describes in detail the ATM as presently used by NOAA’s Southwest Fisheries Science Center (SWFSC) to survey the distributions and abundances of CPS and their oceanographic environments (e.g., Cutter and Demer, 2008; Demer et al., 2012; Zwolinski et al., 2014). In general terms, the contemporary ATM combines information from satellite-sensed oceanographic conditions, multi-frequency echosounders, probe-sampled oceanographic conditions, pumped samples of fsh eggs, and trawl-net catches of juvenile and adult CPS. The survey area is initially defned with consideration to the potential habitat of the northern stock of Pacifc Sardine for summer surveys or the central stock of Northern Anchovy for spring surveys, when they occur. The survey area is further expanded to encompass as much of the potential habitat as possible for other CPS present of the West Coast of the U.S. and Baja CA, as time permits. Along transects in the survey area, multi-frequency split-beam echosounders transmit sound pulses downward beneath the ship and receive echoes from animals and the seabed in the path of the sound waves. Measurements of sound speed and absorption from conductivity-temperature-depth (CTD) probes allow accurate compensation of these echoes for propagation losses. The calibrated echo intensities, normalized to the range-dependent observational volume, provide indications of the target type and behavior (e.g., Demer et al., 2009b).Presented here are: 1) a detailed description of the ATM used to survey CPS in the California Current Ecosystem (CCE) of the west coast of the U.S. and portions of Baja CA; and 2) estimates of the abundances, biomasses, size structures, and distributions of CPS, specifcally the northern and southern stocks of Pacifc Sardine; the central and northern stocks of Northern Anchovy, Pacifc Mackerel, Jack Mackerel, and Pacifc Herring for the core and nearshore survey regions in which they were sampled. Additional details about the survey may be found in the survey report (Renfree et al., 2023). completed NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact NCEI Contact Information Information for contacts at NCEI. information pointOfContact NOAA National Centers for Environmental Information Water Column Sonar Data Manager (303) 497-4742 325 Broadway, Mail Code E/NE42 Boulder CO 80305-3328 USA wcd.info@noaa.gov pointOfContact notPlanned 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 theme Global Change Master Directory (GCMD) Science Keywords 2025 revision 22 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. 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URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian North Pacific Ocean place International Hydrographic Organization (IHO) Sea Area ("Limits of Oceans and Seas" publication S-23) 2010-08-24 revision International Hydrographic Organization (IHO) Sea Area ("Limits of Oceans and Seas" publication S-23) https://iho.int/ International Hydrographic Organization (IHO) Sea Area ("Limits of Oceans and Seas" publication S-23) Publication of Sea Areas is maintained by IHO. information resourceProvider 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 dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2025 revision 22 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 22. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian Vertical Location > Water Column place Global Change Master Directory (GCMD) Location Keywords 2025 revision 22 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 22. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian In Situ/Laboratory Instruments > Profilers/Sounders > Acoustic Sounders > WCMS > Water Column Mapping System instrument Global Change Master Directory (GCMD) Instrument Keywords 2025 revision 22 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 22. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian otherRestrictions Cite as: NOAA Southwest Fisheries Science Center. 2026. MS70 Water Column Sonar Data Collected During RL2206. NOAA National Centers for Environmental Information. https://doi.org/10.25921/c3e6-8781 [access date] otherRestrictions 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. otherRestrictions 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 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. otherRestrictions Resource may not be available for up to one year after initial collection. RL2206_MS70 largerWorkCitation operation DISTRIBUTION, BIOMASS, AND DEMOGRAPHICS OF COASTAL PELAGIC FISHES IN THE CALIFORNIA CURRENT ECOSYSTEM DURING SUMMER 2022 BASED ON ACOUSTIC-TRAWL SAMPLING largerWorkCitation program eng; USA oceans geoscientificInformation -124.07988 -116.33044 30.8951 39.90192 2022-06-27T00:00:00 2022-09-30T11:59:59 Trackline physicalMeasurement NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact NCEI Contact Information Information for contacts at NCEI. information distributor Free Contact the NCEI Water Column Sonar Data Manager to order data. ME70 1 Simrad MS70 raw files. See the Simrad MS70 interface specification manual for additional information. https://www.ncei.noaa.gov/maps/water-column-sonar/index.html?surveys=RL2206&instruments=MS70 HTTPS Water Column Sonar Data Map Viewer Interactive map viewer to allow discovery and access to water column sonar data search https://registry.opendata.aws/ncei-wcsd-archive/ HTTPS AWS Cloud Storage Bucket AWS Cloud Storage to provide additional public access to water column sonar data through the NOAA Open Data Dissemination project (NODD) download https://www.ngdc.noaa.gov/mgg/wcd/ HTTPS Water Column Sonar Data Archive Homepage Web page containing information on the water column sonar data archive. information collectionHardware 23-Jun-2022 Instrument calibration information Calibrated w/ calibration data series Horizontal Positional Accuracy Positional accuracy dependent on navigation GPS, ship motion correction, and sound velocity profile accuracy. true Vertical Positional Accuracy Vertical accuracy is dependent on navigation GPS and ship motion corrections. true Raw unprocessed data files 2022-06-27T00:00:00 David Demer NMFS/SWFSC AST Supervisor/Senior Scientist 858-546-5603 8901 La Jolla Shores Drive La Jolla CA 92037 USA david.demer@noaa.gov principalInvestigator Simrad ME70 Echosounder ME70 Simrad - Kongsberg Maritime AS +47 3303 4000 (Norway) +47 3304 2987 (Norway) P.O. Box 111 Strandpromenaden 50 Horten 3191 Norway contact@simrad.com resourceProvider Simrad ME70 multibeam The Simrad ME70 is a high resolution scientific multibeam echo sounder with very low sidelobe levels. It is dedicated for collection of data in the water column. The multibeam echo sounder combines the large and flexible sampling volume of the multibeam swath with the accuracy of the quantitative scientific echo sounder. A bathymetric option is also available to provide a high resolution seabed mapping capability, and the possibility to study the fish habitat. RL2206_MS70 completed NOAA Ship Reuben Lasker (R228) Reuben Lasker (RL) Funded under the American Recovery and Reinvestment Act and built by Marinette Marine Corporation in Wisconsin, the ship¿s primary objective is to support fish, marine mammal, and turtle surveys off the U.S. West Coast and in the eastern tropical Pacific Ocean. The ship has a low sound signature to reduce reactions of fish to the presence of the ship and provides for a low signal-to-noise ratio for acoustic sensors. This allows scientists to study fish populations and collect oceanographic data with fewer effects on fish and marine mammal behavior. The multi-frequency scientific sonars provide the ability to conduct acoustic surveys that can distinguish fish types, estimate biomass, determine fish school shapes, and provide data on sea floor topography. Reuben Lasker is also equipped with oceanographic sampling and measurement systems, instrumented trawls, longlines, and plankton nets for direct sampling. The ship has a dynamic positioning system to steer along a pre-determined trackline and to accurately hold the ship in a fixed position. The ship is also equipped with meteorological data collection systems and has extensive wet and dry labs to provide maximum utilization of every hour at sea. These technologies will dramatically improve the ability to conduct diverse data collection operations as required by its mission. The ship is named after Dr. Reuben Lasker (1929-1988), who served as the Director of SWFSC's Coastal Fisheries Division and as adjunct professor at Scripps Institution of Oceanography, U.C. San Diego. Dr. Lasker built a renowned research group that focused on the recruitment of young fish to the adult population - a topic with implications for fisheries management throughout the world. Office of Marine and Aviation Operations 206-553-2246 NOAA/OMAO/MOC-P 1801 Fairview Avenue East Seattle WA 98102-3767 USA CO.MOC.Pacific@noaa.gov pointOfContact NOAA National Marine Fisheries Service Southwest Fisheries Science Center 858-546-7000 8901 La Jolla Shores Dr. La Jolla CA 92037 USA pointOfContact Simrad ME70 Echosounder ME70 Simrad - Kongsberg Maritime AS +47 3303 4000 (Norway) +47 3304 2987 (Norway) P.O. Box 111 Strandpromenaden 50 Horten 3191 Norway contact@simrad.com http://www.simrad.com/www/01/nokbg0240.nsf/AllWeb/96CD4279D3997892C125719A003A3862?OpenDocument ME70 documentation Information on the Simrad ME70 inculding file format information information resourceProvider Simrad ME70 multibeam The Simrad ME70 is a high resolution scientific multibeam echo sounder with very low sidelobe levels. It is dedicated for collection of data in the water column. The multibeam echo sounder combines the large and flexible sampling volume of the multibeam swath with the accuracy of the quantitative scientific echo sounder. A bathymetric option is also available to provide a high resolution seabed mapping capability, and the possibility to study the fish habitat. Simrad EK60 Echosounder EK60 Simrad - Kongsberg Maritime AS +47 3303 4000 (Norway) +47 3304 2987 (Norway) P.O. Box 111 Strandpromenaden 50 Horten 3191 Norway contact@simrad.com http://www.simrad.com/www/01/nokbg0240.nsf/AllWeb/A25148D8E9F00D0DC12570DE0050A7CB?OpenDocument Simrad EK60 Scientific echo sounder Information on the Simrad EK60 including file format documentation. information resourceProvider Simrad EK60 singlebeam The Simrad EK60 Scientific Sounder system is a new generation fishery researchtool, based on experience from the EK500. The new electronic hardware is combined with up to date PC processing and Windows operation. The EK60 provides facilities for accurate echo sounding, data storage, data analysis and reporting results. The system communication is through Ethernet, which gives flexibility in the location of the EK60 system units and allows easy access to data from other instruments or stations on a vessel network. A post processing software, BI60, is also included in the EK60 system.