KEY = http://www.ccom.unh.edu/unclos/reports.htm --- AREA/CRUISE INFORMATION (same across all metadata files for this cruise) Title: Raw Kongsberg Simrad EM121A multibeam data for the western insular slopes of the U.S. Northern Mariana Islands Abstract: Kongsberg Simrad EM121A multibeam data were collected in Simrad raw.all format. Purpose: The National Oceanic and Atmospheric Administration (NOAA), on behalf of the United States Government, has a requirement to carry out surveys of specific regions on the U.S. continental margins (slope and rise) in the U.S. Northern Mariana Islands in order to obtain multibeam bathymetry. These data are required to support any potential claim for jurisdiction of an extended continental shelf by the United States under Article 76 of the United Nations Convention on the Law of the Sea (UNCLOS). The requirement is for the collection and processing of full-coverage multibeam sonar data and ancillary data in water depths of approximately 2000 to 5000 m in order to precisely define the location of the 2500-m isobath and the "foot of the slope" as defined under UNCLOS Article 76. As part of their NOAA-funded research program, University of New Hampshire (UNH) researchers oversaw data acquisition, processing and archiving of the data collected during the cruise. Supplemental_Information: Information about UNH Center for Coastal and Ocean Mapping field activity are online at . Beginning_Date: December 11, 2007 (JD345) Ending_Date: December 11, 2007 (JD345) Start_Time: 11:48:59 End_Time: 13:20:18 Theme_Keyword: Raw Datagrams Theme_Keyword: Insular margin Place_Keyword: Northern Mariana Islands Attribute_Accuracy_Report: All soundings are within 0.3% of water depth, based on cross-line checks. Horizontal_Positional_Accuracy_Report: Horizontal positioning of the vessel was determined using inertial-aided DGPS. Positioning is accurate to better than 1 meter (at 95% confidence) during all surveying. All positioning is referenced to the WGS84 Datum. --- LINE INFORMATION West_Bounding_Coordinate: 142.573825 East_Bounding_Coordinate: 142.753066 North_Bounding_Coordinate: 16.469828 South_Bounding_Coordinate: 16.127541 --- SEG-Y DATA FORMAT INFORMATION Theme_Keyword: Line Number 0220_111207_114930 Transfer_Size_MB: 3.1MB