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EK80 Water Column Sonar Data Collected During PC2101

Metadata Updated: May 19, 2023

NOAA Ship Pisces will conduct a survey of reef fish located on the US continental shelf and shelf-edge of the GOM from March 11 through May 27, 2021. Six hundred and eighteen sites have been selected for sampling with the Spherical/Satellite array, bandit reels and CTD during daylight hours; 460 in the western GOM and 158 in the eastern GOM (Figures 1 & 2). Individual sampling sites will be supplied prior to sailing. Mapping will be conducted at night at randomly selected areas near the following or previous day’s sampling.

Mapping operations: Bathymetric mapping will be conducted in and around selected sites at night with the ME 70 sonar (Figures 1 & 2). Night-time mapping will commence at sunset, or when day operations have finished, in the general area of the sites sampled that day or the area planned for the next day. Mapping will be concluded at sunrise, or whatever time is needed, in order to be on site for operations the following morning. A CTD cast will be conducted prior to, during, and after acoustic transects to obtain speed-of-sound for proper processing of data. All other acoustic systems need to be secured prior to and during acoustic transects to eliminate acoustic contamination of the mapping data. If other systems are required to ensure safe transit while mapping, ensure that the acoustic signals are offset and not interfering with each other. All transect lines for mapping will be composed in Hypack by the FPC and made available to the ship’s bridge. The mapping goal is to locate features within and outside our current universe to expand the sample universe as well as improve the ability for site selection by closing gaps created by mapping with less precise systems.

Camera operations will utilize up to three Spherical/Satellite camera arrays of which one is 48” tall, 40” diameter, (Figure 3) and the 2 others, 36” tall, 40” diameter (Figure 4). Each Spherical/Satellite camera array has a mounted Eureka Manta CTD which collects environmental parameters during soak time, two pressure housings (rated to 500 m), one containing six video cameras, which provide a near spherical field of view and the second containing the satellite camera. Camera 3 in the spherical housing will be paired with the satellite camera to obtain stereo measurements. The Spherical/Satellite camera arrays will be deployed 1 h after sunrise, with the last retrieval 1 h prior to sunset. The arrays will be baited with mackerel and squid and soak on the seafloor for 30 minutes. In order to maximize sampling time, multiple Spherical/Satellite camera arrays (clusters of up to three) will be set consecutively. The clustered sites will be separated by a minimum of 0.2 nm and a maximum of 2 nm. This will ensure relatively quick and safe transit between individual sites. While the first camera array is soaking, the ship will proceed to the next two sites and deploy two additional arrays. Once the third camera array is in the water, the ship will retrieve the first deployment, then second and so on. As sea conditions change, retrieval order may be modified by bridge to avoid navigation issues (e.g. buoys in close proximity and changing currents).

Bandit reels will be deployed after each cluster (3) of cameras are retrieved. This will allow up to 3-4 bandit reel stations per day. During bandit reel operations, the reels are only to be deployed under the following conditions: 1) a member of the deck department and scientific party are both present at each reel, 2) the ship is in position in DP and stable with the OOD having notified as such and 3) the FPC has given the all clear for the reels to be baited and deployed.

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.

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Dates

Metadata Date May 15, 2023
Metadata Created Date May 12, 2023
Metadata Updated Date May 19, 2023
Reference Date(s) March 11, 2021 (creation), May 15, 2023 (publication)
Frequency Of Update notPlanned

Metadata Source

Harvested from NGDC MGG Sonar Water Column

Additional Metadata

Resource Type Series
Metadata Date May 15, 2023
Metadata Created Date May 12, 2023
Metadata Updated Date May 19, 2023
Reference Date(s) March 11, 2021 (creation), May 15, 2023 (publication)
Responsible Party NOAA National Centers for Environmental Information (Point of Contact)
Contact Email
Guid gov.noaa.ncei:PC2101_EK80
Access Constraints Cite as: NOAA/NMFS Mississippi Laboratory, NOAA/NMFS Stennis Space Center, Northern Gulf Institute NGI, University of West Florida (UFW). 2023. EK80 Water Column Sonar Data Collected During PC2101. NOAA National Centers for Environmental Information. https://doi.org/10.25921/ypev-mq95 [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 -79.77467
Bbox North Lat 30.36807
Bbox South Lat 24.19001
Bbox West Long -97.19899
Coupled Resource
Frequency Of Update notPlanned
Harvest Object Id a74168f2-79ca-4877-8ab0-3ac53205f0c3
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 Unknown
Metadata Language eng; USA
Metadata Type geospatial
Old Spatial {"type": "Polygon", "coordinates": [[[-97.19899, 24.19001], [-79.77467, 24.19001], [-79.77467, 30.36807], [-97.19899, 30.36807], [-97.19899, 24.19001]]]}
Progress completed
Spatial Data Service Type
Spatial Reference System urn:ogc:def:crs:EPSG::4326
Spatial Harvester True
Temporal Extent Begin 2021-03-11T00:00:00
Temporal Extent End 2021-05-27T11:59:59

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