| Alternate number: | 81-LH-1; LONGHORN-81-USGS1 |
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| Platform: | 
LONGHORN |
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| Submersible: | |
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| Owner-Operator: | University of Texas, Port Aransas, TX |
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| Captain: | Donald Gibson - U. Texas |
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| Center Principal: | Peter Johnson
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Affiliate Principal
(if any): | Chuck Holmes - USGS-Corpus Christi, TX |
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| Area of Operations: | Florida Straits, West Florida shelf, Florida, Gulf of Mexico, United States, North America, North Atlantic |
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| Bounding Coordinates | |
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| North: | 26.00000 |
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| South: | 24.00000 |
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| West: | -84.50000 |
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| East: | -81.00000 |
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| Start and End Dates: | May 27, 1981 to June 09, 1981 |
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| Start and End Ports: | from Key West, FL to Miami, FL |
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| Days at Sea: | 14 |
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| Project Number: | WFLASHLF |
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| Project Title: | West Florida Shelf |
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| Cruise Funding Source: | SIR |
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| Contract: | |
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| Type of Activity: | Sampling
Seismic profiling
Sea floor mapping
Photography
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| Objectives: | Obtain seismic reflection data in the Florida Straits and the Florida Shelf; photograph the Miocene(?) ledge to confirm the existence of mineral deposits. |
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| Information to be derived: | Grain size analysis
Sea floor map
Morphology
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| Data Types (and Media) Produced: | |
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Scientific Party
(USGS): | Chuck Holmes
Peter Johnson
Jack Kindinger
Jim McFarlen
Ron Miller
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Scientific Party
(affiliate): | Paul Schoeder |
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| Data Curator: | |
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| Scientific Equipment: | Klein sidescan, Del Norte, miniranger, ORE 3.5 kHz sub-bottom profiler, Benthos camera, minisparker
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| Navigation techniques used: | Del Norte, Miniranger, LORAN-C; |
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| Summary of Results: | Sidescan: 550 km; Minisparker: 1603 km; 3.5 kHz: 608 km; Core (rotary drill): 1; Diver samples: 3; Camera stations: 3. |
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| Number of Stations Occupied: | 4 |
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| Station Description: | |
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| Number of Submersible Dives: | 0 |
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| Continuous Data (in Km): | 1603 |
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| Seismic Line Descriptions: | |
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| Track Plot: | |
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| Related Web Sites: | |
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| Remarks: | Original Center People field contained: USGS-Corpus Christi: Chuck Holmes - Ch. Sci., Ronald Miller, Jack Kindinger, Paul Schoeder, James McFarlen; USGS-Woods Hole: Peter Johnson. |
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| Contact: | Chuck Holmes () |
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Report Date: 2009-11-25 00:00:00 | |