Summary for Field Activity Number 1980-015-FA

Alternate Leg ID: WF 80-2

Area of Operations: Georges Bank, United States, North America, North Atlantic

Dates: June 23, 1980 to June 26, 1980

Objectives: Monitor the migration rates of sand waves within a 1.5 x 1.5 km area on Georges Bank.

Type of Activity: Sea floor mapping

Information to be derived: Time series data
Echo sounding survey and sidescan sonar surveys

Summary: Three acoustic transponders were deployed and surveyed in to define their positions relative to each other. After establishing the navigation grid, a sidescan sonar and 3.5 kHz echo sounding survey was completed to define the location and size of the sand waves. At the end of the survey, one transponder was recovered (#199) while the other two (#200?, 201?), which are marked by surface buoys, were left to serve as fixed references for the navigation nets of the next two surveys.

USGS Project Number: EA

Contact: Dave Twichell (dtwichell@usgs.gov)