Water Column Sonar Data Map Viewer
type: Distribution
access URL: http://maps.ngdc.noaa.gov/viewers/water_column_sonar/
media type: Kongsberg/Simrad instrument files (.raw or .wcd)
description: Interactive map viewer to allow discovery and access to water column sonar data
issued: 2018-02-08T01:13:03.260524
modified: 2025-11-29T17:53:46.008138

NEFSC 2012 Atlantic Herring Acoustic/Midwater Trawl Survey (PC1206, EK60)
type: Dataset
keyword: amerigeoss
keyword: geoss
keyword: north-america
keyword: geo
keyword: united-states
keyword: ckan
keyword: amerigeo
keyword: national
description: The NEFSC Atlantic herring acoustic survey is a fisheries independent survey that provides scientific data for Atlantic herring assessments in the U.S. mid-Atlantic and New England regions. The survey is conducted in the fall on pre-spawning and spawning herring primarily in the Georges Bank region, but with other historical sites in the Gulf of Maine surveyed. The survey is a systematic design with parallel transects oriented perpendicular to bathymetric features. Midwater trawl sites are selected on an ad hoc basis to sample acoustic backscatter attributed to Atlantic herring as well as backscatter by other organisms. The primary gear is multifrequency Simrad echosounders, but midwater trawl, CTD, and a host of other scientific sensor data are collected ancillary to the acoustic data.
issued: 2025-11-29T17:53:46.016697
modified: 2025-11-29T17:53:46.016701

International Hydrographic Organization (IHO) Sea Area ("Limits of Oceans and Seas" publication S-23)
type: Distribution
access URL: http://www.iho-ohi.net/iho_pubs/standard/S-23/S23_1953.pdf
description: Publication of Sea Areas is maintained by IHO.
format: PDF
issued: 2018-02-08T01:13:03.260541
modified: 2025-11-29T17:53:46.008965

Global Change Master Directory (GCMD) Keywords
type: Distribution
access URL: https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords
description: The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords.
issued: 2018-02-08T01:13:03.260551
modified: 2025-11-29T17:53:46.010127

Global Change Master Directory (GCMD) Keywords
type: Distribution
access URL: https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords
description: The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords.
issued: 2018-02-08T01:13:03.260537
modified: 2025-11-29T17:53:46.008574

US Migrating
type: Agent

Global Change Master Directory (GCMD) Keywords
type: Distribution
access URL: https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords
description: The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords.
issued: 2018-02-08T01:13:03.260548
modified: 2025-11-29T17:53:46.009743

Global Change Master Directory (GCMD) Keywords
type: Distribution
access URL: https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords
description: The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords.
issued: 2018-02-08T01:13:03.260544
modified: 2025-11-29T17:53:46.009354