Field Activity 1975-013-FA

Identifier 1975-013-FA
Alternate names Party 77, B-1-75-GM
Purpose 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.
Location upper continental slope, Texas to Florida, Gulf of Mexico, United States, North America, North Atlantic;
Summary 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.
Comments Data borrowed by PCMSC (Alan Cooper); returned ~1/30/2018 Navigation was by Offshore Navigation, Inc.
Platform
Western Beacon
Length: 28 meters; Beam: 7 meters.
Itinerary
Start Port Mansfield, TX 1975-07-28
End 1975-12-20
Bounds
West -96.25
East -84.5
North 31.5
South 25.75

Personnel

Organization
384 Woods Hole Road
Quissett Campus
Woods Hole, MA02543-1598
(508) 548-8700
Principal investigators Louis E. Garrison
Crew members
Affiliate principal Western Geophysical Company of America
Affiliate staff Survey contracted to Western Geophysical Company of America.

Data types and categories

Data category: Location-Elevation, Seismics
Data type: Navigation, Sparker, Sub Bottom Profiler

Equipment used

Equipment Usage description Data types Datasets
Sparker Sparker (no data reported)
Loran-C Navigation (no data reported)
Single channel hydrophone Air Gun / Water Gun, Boomer, Bubble Gun, Sparker, Sub Bottom Profiler 1
3.5 kHz Sub Bottom Profiler (no data reported)

Datasets

Datasets produced in this activity

Dataset name Equipment Description Dataset contact
1975-013-FA-SE-001 Single channel hydrophone microfilm of Nancy K. Soderberg

Publications

Samples collected during this field activity