Other ID: WF 81-1
Organization(s): USGS, Woods Hole Coastal and Marine Science Center
Location: Georges Bank, United States, North America, North Atlantic,
Principal Investigator(s): David Twichell
Data Type(s): Sonar: Sidescan, Seismics: Sub Bottom Profiler, Location-Elevation: Navigation
Scientific Purpose/Goals: Evaluate sand wave migration rates in a small area on Georges Bank.
Start Date: 1981-04-01
Start Port/Location: Woods Hole, MA
End Date: 1981-04-06
End Port/Location: Woods Hole, MA
Equipment Used: Klein 531 sidescan, ORE 140 transceiver/1036 transducer sub-bottom profiler, Northstar 6000 LORAN-C, ATNAV acoustic transponder
Information to be Derived: Sea floor map;
Summary of Activity and Data Gathered: WHITEFOOT 81-1 cruise was the final of 3 cruises conducted to evaluate sandwave migration rates in a small area (about 1.5 x 2.0 km) on Georges Bank. During this cruise two of the three transponders deployed on WF 80-2 (FA 80015) and WF 80-3 (FA 80026) were enabled. The third could not be enabled, so one transponder was deployed. The three transponders were surveyed in to establish the navigation grid, then the survey was conducted using sidescan sonar and 3.5 kHz echo sounding techniques. After completing the survey, the three transponders were recovered and the transponder which could not be enabled was lost. In addition to the detailed survey, some widely spaced lines were run to obtain an understanding of the setting of the study area. 3.5 kHz data: 199 km; Sidescan data: 199 km.
Staff: David Twichell