EK60 Water Column Sonar Data Collected During DY1401
Gulf of Alaska Acoustic-Trawl Survey of Walleye Pollock (DY1401, EK60). The Midwater Assessment and Conservation Engineering (MACE) program of NOAA National Marine Fisheries Service (NMFS), Alaska Fisheries Science Center (AFSC) conducted an acoustic-trawl (AT) stock assessment survey in the Shumagin Islands and Sanak Trough areas of the Gulf of Alaska (GOA) during the winter of 2014 to estimate the distribution and abundance of walleye pollock (Gadus chalcogrammus). The survey was conducted 21-28 February (Shumagin Islands 23-27 February; Sanak Trough 26 February), starting and ending in Kodiak, Alaska. The survey was conducted aboard NOAA Ship Oscar Dyson, a 64 meter stern trawler equipped with acoustic and oceanographic instrumentation. The primary instrument for the survey was a Simrad EK60 split-beam echosounder system utilizing five frequencies (18, 38, 70, 120, and 200 kHz).
Dataset Citation
- Cite as: Alaska Fisheries Science Center. 2014. 'EK60 Water Column Sonar Data Collected During DY1401'. NOAA National Centers for Environmental Information. doi:10.7289/V59S1P0G [access date]
Dataset Identifiers
- DY1401_EK60
- doi:10.7289/V59S1P0G
- NCEI Metadata ID:gov.noaa.ngdc.mgg.wcd:DY1401_EK60
ISO 19115-2 Metadata
gov.noaa.ngdc.mgg.wcd:DY1401_EK60
Search Data |
|
Distribution Formats |
|
Ordering Instructions | Contact the NCEI Water Column Sonar Data Manager to order data. |
Distributor |
NOAA National Centers for Environmental Information ncei.info@noaa.gov |
Dataset Point of Contact |
NOAA National Centers for Environmental Information ncei.info@noaa.gov |
Dataset Point of Contact | Water Column Sonar Data Manager NOAA National Centers for Environmental Information (303) 497-4742 wcd.info@noaa.gov |
Time Period | 2014-02-21T02:52:07 to 2014-03-01T01:30:36 |
Spatial Reference System | urn:ogc:def:crs:EPSG::4326Vertical Datum: Unknown |
Spatial Bounding Box Coordinates |
West: -162.78638
East: -152.15749
South: 54.46057
North: 58.02173
|
Spatial Coverage Map |
General Documentation |
|
Associated Resources |
Publication Dates |
|
Dataset Progress Status | Complete - production of the data has been completed |
Data Update Frequency | Not planned |
Purpose | Acoustic-trawl (AT) survey of walleye pollock (Gadus chalcogrammus) in the Shumagin Islands and Sanak Trough areas of the Gulf of Alaska |
Use Limitations |
|
Dataset Citation |
|
Cited Authors |
|
Principal Investigators |
|
Custodians |
|
Publishers |
|
Theme keywords |
Global Change Master Directory (GCMD) Science Keywords
|
Data Center keywords |
Global Change Master Directory (GCMD) Data Center Keywords
|
Instrument keywords |
Global Change Master Directory (GCMD) Instrument Keywords
|
Place keywords |
International Hydrographic Organization (IHO) Sea Area ("Limits of Oceans and Seas" publication S-23)
|
Use Constraints |
|
Access Constraints |
|
Fees |
|
Lineage information for: series | |
---|---|
Processor |
|
Lineage information for: series | |
---|---|
Lineage Statement | The EK60 transducers installed on the Oscar Dyson are mounted on a deployable centerboard. The transducer draft settings in the EK60 software are nominally correct when the centerboard is fully extended (draft correction setting is 9.15 meters below the surface). When the centerboard is in the retracted position (transducers approximately flush with the vessel's keel), the transducers are nominally 6.1 meters below the surface. |
Acquisition Information (collection) | |
---|---|
Instrument |
|
Platform |
|
Operation |
|
Last Modified: 2020-06-03
For questions about the information on this page, please email: ncei.info@noaa.gov
For questions about the information on this page, please email: ncei.info@noaa.gov