NEFSC 2012 Spring Bottom Trawl Survey (HB1201, EK60)
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Anchor: DOI doi:10.7289/V5251G5V
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abstract: The NEFSC bottom trawl survey is a fisheries independent, multi-species survey that provides the primary scientific data for fisheries assessments in the U.S. mid-Atlantic and New England regions. Two bottom trawl surveys are conducted each year, one in the spring and one in the autumn. The survey is a standardized, stratified random design, with stratification based on bathymetry and multiple trawl sites within each stratum. Trawl sites are selected randomly, but the overall ship path is south to north. The survey covers the continental shelf and U.S. exclusive economic zone (EEZ) from Cape Hatteras, North Carolina into the Canadian EEZ. The primary gear is a bottom trawl, with CTD, multifrequency echosounder, and a host of other scientific sensor data collected ancillary to the bottom trawl catches.
purpose: The NEFSC bottom trawl survey provides fisheries independent abundance and biological data for fisheries assessments along the U.S. east coast.
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keyword: Earth Science > Biosphere > Ecosystems > Marine Ecosystems > Pelagic
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keyword: Earth Science > Biosphere > Ecosystems > Marine Ecosystems > Benthic
keyword: Earth Science > Biosphere > Ecosystems > Aquatic Ecosystems
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keyword: In Situ/Laboratory Instruments > Profilers/Sounders > Acoustic Sounders > WCMS > Water Column Mapping System
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otherConstraints: Cite as: Northeast Fisheries Science Center (2012): Water Column Sonar Data Collection (HB1201, EK60). National Centers for Environmental Information, NOAA. doi:10.7289/V5251G5V [access date]
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otherConstraints: 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.
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useLimitation: 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.
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beginPosition: 2012-02-28T18:59:02
endPosition: 2012-05-04T15:18:26
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specification: Kongsberg/Simrad .raw files are generated by ME70, EK60 or ES60 instruments. They contain power and optionally angular position data with each beam/frequency identified by an independent channel. See the Simrad interface specification manual for further information. The .wcd files are generated by Kongsberg EM302 or EM122 instruments. See Kongsberg documentation for more information.
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orderingInstructions: Contact the Water Column Sonar Data Manager to order data
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description: Interactive map viewer to allow discovery and access to water column sonar data
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dataQualityInfo: (DQ_DataQuality)
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DateTime: 2012-02-28T18:59:02
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description: 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.
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