Field Activity 1987-042-FA

Identifier 1987-042-FA
Alternate names STRL S8-87-AFR
Purpose Collect gravity, magnetics and bathymetric data in and around the waters of Equatorial Guinea and Gabon as specified by DMA requirements.
Location Gabon, Equatorial Guinea, Africa, North Atlantic, South Atlantic;
Summary The ship departed Doula and proceeded to surops area on 22 Oct. 1987. Upon completion of lines begun on previous leg S7-87-AFR in the waters off Gabon, the ship headed northward to complete lines off Equatorial Guinea. Several lines in both survey areas were shortened on landward end due to shoals. The presence of oil rigs required further adjustments of lines in both regions. Surveying was completed on 31 Oct. 1987 followed by a three-day transit to Abidjan where the ship docked on 4 Nov. 1987. Final gravity land ties were completed in Abidjan on 5 Nov. to tie ship meter data with a known gravity station and to verify the accuracy of two previous land ties performed in the same area.
Comments Original Center People field contained: Catherine Delorey - Ch. Sci., Carol Renaud, Linda Sheetz. Project = Defense Mapping Agency Gravity, Defense Mapping Agency Gravity
Platform
Starella
Length: 73 meters; Beam: 11 meters.
Itinerary
Start Douala, Cameroon 1987-10-22
End Abidjan, Cote d'Ivoire 1987-11-04
Days in the field 14
Bounds
West 8
East 11
North 4.5
South 3.5

Personnel

Organization
384 Woods Hole Road
Quissett Campus
Woods Hole, MA02543-1598
(508) 548-8700
Principal investigators Catherine Delorey
Crew members
Catherine Delorey
Scientist, Staff
Ryland, Carol A.
Scientist, Staff
Information specialist(s)
Catherine Delorey
Specialist, Information
Affiliate staff Linda Sheetz; William Wright - USGS, Reston

Data types and categories

Data category: Electro-Magnetic, Sonar, Location-Elevation
Data type: Gravity, Single Beam, Magnetics, Navigation

Documents: Notes and log books

Name Description
Cruise report Chief Scientist's report including personnel, purpose, equipment, tabulated information, brief narrative, and trackmaps.

Equipment used

Equipment Usage description Data types Datasets
LaCoste-Romberg gravimeter G-179 Gravity (no data reported)
12 kHz Single Beam 1
Geometrics G-856 magnetometer Magnetics (no data reported)
GE 810 Correlation sonar Navigation (no data reported)
Gyro compass Navigation (no data reported)
GPS (wh) Navigation (no data reported)

Datasets

Datasets produced in this activity

Dataset name Equipment Description Dataset contact
1987-042-FA-SE-001 12 kHz Collection of paper record displays of seismic data (12K) for lines Nancy K. Soderberg

Publications

Samples collected during this field activity