Other ID: Party 77
Organization(s): USGS, Woods Hole Coastal and Marine Science Center
Location: upper continental slope, Texas to Florida, Gulf of Mexico, United States, North America, North Atlantic;
Principal Investigator(s): Louis E. Garrison
Affiliate Investigator(s): Western Geophysical Company of America
Data Type(s): Location-Elevation: Navigation, Seismics: Sparker, Seismics: Sub Bottom Profiler
Scientific Purpose/Goals: Contractor Western Geophysical Company of America will conduct a high-resolution geophysical survey on the upper continental slope in the Gulf of Mexico, north of latitude 26 N, in water depths between 100 m and 1,000 m with seismic lines spaced from 7.5 to 18.5 km apart in a reconnaissance grid pattern.
Start Date: 1975-07-28
Start Port/Location: Port Mansfield, TX
End Date: 1975-12-20
Equipment Used: 3.5 kHz, Sparker system, Loran-C, Single channel hydrophone
Information to be Derived:
Summary of Activity and Data Gathered: The released data consist of single-channel geophysical records from a 3.5 kHz sub-bottom profiler and a 1,000 joule sparker operated simultaneously throughout 18,074 km of ship's track: Lines 1A, 2 thru 214, 20A, 22A, 26A, 30A, and 69A. Data quality for all records at all water depths was good to excellent. Other data collected includes bathymetry and magnetics.
Notes: Navigation was by Offshore Navigation, Inc.