gov.noaa.nmfs.inport:32341 eng UTF8 dataset Alaska Fisheries Science Center 7600 Sand Point Way N.E., Building 4 Seattle WA 98115 USA https://www.afsc.noaa.gov WWW:LINK-1.0-http--link Website Website for this organization information 0700-1700 Pacific Time resourceProvider Intelmann, Steve (206) 526-4157 (206) 526-6723 7600 Sand Point Way N.E., Building 4 Seattle WA 98115 USA steve.intelmann@noaa.gov pointOfContact 2026-03-04T19:17:17 ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data ISO 19115-2:2009(E) AFSC/RACE/GAP/McConnaughey:USBL Proof of Concept-1998-Scanmar Data publication NOAA/NMFS/EDM 32341 https://www.fisheries.noaa.gov/inport/item/32341 WWW:LINK-1.0-http--link Full Metadata Record View the complete metadata record on InPort for more information about this dataset. information McConnaughey, Bob bob.mcconnaughey@noaa.gov originator The trials were conducted in Dabob Bay, Washington, in May 1998. The main objective of these trials was to determine an accurate and reliable system to track a fishing trawl. Three USBL vendors were invited and agreed to participate in the trials. Nautronix Ltd. (Nautronix) provided their ATS II system, Simrad Subsea A/S (Simrad) provided their ITI system, and Ocean Research Equipment, Inc. (ORE) submitted their Trackpoint II Plus system. A local ORE distributor, MECCO, Inc. (MECCO), provided and operated the Trackpoint II Plus system. The U.S. Navy?s fixed, underwater tracking range in Dabob Bay, operated by the Naval Undersea Warfare Center (NUWC) Division ? Keyport, Washington, was also used in these trials. The range was used to provide simultaneous sub-sea positioning of the fishing trawl and to serve as a benchmark for system evaluations. The U.S. Navy also provided surface navigation support for the fishing vessel during these trials. The vessel selected by AFSC to conduct these trawls was the F/V Vesteraalen. It is 124 feet long, has a beam of 32 feet, and a draft of 18 feet. The F/V VESTERAALEN has a single, fixed-pitch propeller with a nozzle. By design, the vessel is like most in-shore trawlers and has, in fact, operated in Alaska in the past. The tests were conducted using NMFS otter trawls, typically used in Alaskan waters. A trial schedule was developed that would provide each vendor with three days to mobilize and test their systems. Each vendor?s equipment was attached to the fishing trawl, along with the U.S. Navy tracking gear. Both the U.S. Navy and the USBL vendor collected simultaneous trawl position data as determined by their respective equipment, with the trawl being dragged on the bottom along a predetermined track. The main objective of these trials was to assess the accuracy of each vendor?s equipment. This was accomplished using a statistical comparison between each vendor?s data and the U.S. Navy?s data that were observed simultaneously. This report details the results of these trials and summarizes the comparison results. It also contains details of the equipment and the methodologies used to collect and analyze the data. As a result of the data analysis, conclusions were drawn and recommendations have been included in this report. The National Marine Fisheries Service - Alaska Fisheries Science Center (NMFS-AFSC) recently contracted Racal Pelagos, Inc. (RPI) to coordinate testing of various ultra short baseline (USBL) systems in a bottom trawl environment. The overall purpose of the test was to determine which USBL system performs best in conditions that approximate those in Bristol Bay, Alaska, where future tests will occur in 2000. During the future testing, AFSC will need to accurately track bottom fishing trawls in order to assess their impact upon the sea floor biology in Alaska. The singel polyline in this dataset is the planned survey line for which the trawl was navigated and the USBL systems evaluated. completed McConnaughey, Bob bob.mcconnaughey@noaa.gov pointOfContact McConnaughey, Bob bob.mcconnaughey@noaa.gov email custodian navigation usbl underwater positioning theme puget sound washington place DOC/NOAA/NMFS/AFSC > Alaska Fisheries Science Center, National Marine Fisheries Service, NOAA, U.S. Department of Commerce dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2017-04-24 publication 8.5 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 AFSC/RACE/GAP/McConnaughey:USBL Proof of Concept-1998 project InPort otherRestrictions Cite As: Alaska Fisheries Science Center, [Date of Access]: AFSC/RACE/GAP/McConnaughey:USBL Proof of Concept-1998-Scanmar Data [Data Date Range], https://www.fisheries.noaa.gov/inport/item/32341. NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose. otherRestrictions Access Constraints: None otherRestrictions Use Constraints: None unclassified NOAA Data Management Plan (DMP) NOAA/NMFS/EDM 32341 https://www.fisheries.noaa.gov/inportserve/waf/noaa/nmfs/afsc/dmp/pdf/32341.pdf WWW:LINK-1.0-http--link NOAA Data Management Plan (DMP) NOAA Data Management Plan for this record on InPort. information crossReference eng; US geoscientificInformation oceans Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.3.0.4322 -122.845964 -122.842347 47.745937 47.755749 | Currentness: Study was conducted in May1998 1998-05-20 1998-05-30 Zip Zip Alaska Fisheries Science Center (206) 526-4000 (206) 526-4004 7600 Sand Point Way N.E., Building 4 Seattle WA 98115 USA afsc.webmaster@noaa.gov https://www.fisheries.noaa.gov/about/alaska-fisheries-science-center WWW:LINK-1.0-http--link Alaska Fisheries Science Center Website AKFSC Home Page information 0700-1700 Pacific Time distributor https://access.afsc.noaa.gov/data-zips/32341_GAP_1998_USBL_proof_of_concept_Trawlex_98_Scanmar_data.zip WWW:LINK-1.0-http--link https://access.afsc.noaa.gov/data-zips/32341_GAP_1998_USBL_proof_of_concept_Trawlex_98_Scanmar_data.zip download dataset Completeness Report no report Conceptual Consistency No report unknown