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USGS Coastal and Marine Geology Program

Field Activity Details for field activity 1987-045-FA

Other ID: S9-87-TT

Status: Completed

Organization(s): USGS, Woods Hole Coastal and Marine Science Center

Funding Program(s):

Principal Investigator(s): William J. Strahle

Affiliate Investigator(s):

Information Specialist(s): William J. Strahle

Data Type(s): Electro-Magnetic: Gravity, Sonar: Single Beam, Electro-Magnetic: Magnetics, Location-Elevation: Navigation

Scientific Purpose/Goals: Collection of gravity, magnetics, and bathymetric data in and around the waters of Trinidad and Tobago as specified by DMA requirements.


Start Port/Location: Port of Spain, Trinidad

End Port/Location: Port of Spain, Trinidad

Start Date: 1987-12-04

End Date: 1987-12-14

Equipment Used: GPS (wh), 12 kHz, LaCoste-Romberg gravimeter G-179, Geometrics G-856 magnetometer, Gyro compass, GE 810 Correlation sonar

Information to be Derived:

Summary of Activity and Data Gathered:

Staff: Barry Irwin, Richard Rendigs, William J. Strahle, Sarah Griscom

Affiliate Staff:
Robin Bouse; Neil Lewis - Institute of Marine Affairs; Lindy Phillip - Ministry of Energy

Notes: Original Center People field contained: William Strahle, Barry Irwin, Robin Bouse, Sarah Griscom, Richard Rendigs.
Project = Defense Mapping Agency Gravity, Defense Mapping Agency Gravity


Trinidad and Tobago, South America, Caribbean Sea, North Atlantic;

North: 23 South: 7 West: -87 East: -60


photo of Starella


Folger, D.W., Irwin, Barry J., McCullough, James R., Strahle, William J., Bowin, Carl O., and Polloni, Christopher F., 1990, Map showing free-air gravity anomalies off the coasts of Venezuela and Trinidad-and-Tobago: U.S. Geological Survey Miscellaneous Field Studies Map MF-2097-B, scale 1:1,500,000.


Data Acquired

Survey EquipmentSurvey InfoData Type(s)Data Collected
LaCoste-Romberg gravimeter G-179 --- Gravity
12 kHz --- Single Beam
Geometrics G-856 magnetometer --- Magnetics
GE 810 Correlation sonar --- Navigation
Gyro compass --- Navigation
GPS (wh) --- Navigation

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