Sound velocity profiles were collected using sound velocimeter in the Great Lakes and Galveston Bay from NOAA NAVIGATION RESPONSE TEAM 4 from 11 April 2006 to 04 August 2006. Data were submitted by Ruby L. Becker of National Ocean Service in Silver Spring, Maryland.

Physical oceanographic data were collected from NOAA Navigation Response Team-4 in the Great Lakes from 16 August 2006 to 18 October 2006. Sound velocity profiles were collected from sound velocimeter casts. Data are self documenting and are in plain ASCII text.

Physical oceanographic data were collected from NOAA Navigation Response Team-4 in the Great Lakes from 05 July 2007 to 25 September 2007. Sound velocity profiles were collected from sound velocimeter casts. Data are self documenting and are in plain ASCII text.

In 2008, the U.S. Geological Survey (USGS), Woods Hole Coastal and Marine Science Center (WHCMSC), in cooperation with the U.S. Army Corps of Engineers conducted a geophysical and sampling survey of the riverbed of the Upper St. Clair River between Port Huron, MI, and Sarnia, Ontario, Canada. The objectives were to define the Quaternary geologic framework of the St. Clair River to evaluate the relationship between morphologic change of the riverbed and underlying stratigraphy. This report presents the geophysical and sample data collected from the St. Clair River, May 29-June 6, 2008 as part of the International Upper Great Lakes Study, a 5-year project funded by the International Joint Commission of the United States and Canada to examine whether physical changes in the St. Clair River are affecting water levels within the upper Great Lakes, to assess regulation plans for outflows from Lake Superior, and to examine the potential effect of climate change on the Great Lakes water levels ( http://www.iugls.org). This document makes available the data that were used in a separate report, U.S. Geological Survey Open-File Report 2009-1137, which detailed the interpretations of the Quaternary geologic framework of the region. This report includes a description of the suite of high-resolution acoustic and sediment-sampling systems that were used to map the morphology, surficial sediment distribution, and underlying geology of the Upper St. Clair River during USGS field activity 2008-016-FA . Video and photographs of the riverbed were also collected and are included in this data release. Future analyses will be focused on substrate erosion and its effects on river-channel morphology and geometry. Ultimately, the International Upper Great Lakes Study will attempt to determine where physical changes in the St. Clair River affect water flow and, subsequently, water levels in the Upper Great Lakes.

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Physical oceanographic data were collected by NOAA Navigation Response Team-4 for Cleveland field examination survey in Lake Erie on 17 October 2007. Sound velocity profile was collected from the sound velocimeter cast. Data are self documenting and are in plain ASCII text.

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Sound velocity and depth observation data were collected using sound velocimeter. Data were collected in the Gulf of Mexico from April 4, 2005 to April 24, 2006. Data were submitted by the National Ocean Service (NOS)

Sound velocity, T, and S profiles collected during hydrographic survey OPR-K311-KR-23. This project was performed by David Evans and Associates, Inc. under contract to NOAA Office of Coast Survey. Data are in NetCDF.