Identifier | 1984-009-FA | ||||||||
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Alternate names | J-163 (Leg IV) | ||||||||
Purpose | 1) Test our hypothesis that rough bottom topography in the Mid-Atlantic Bight resulted from bioerosion by the tilefish community, and 2) further develop the use of sidescan sonar and sub-bottom profiling as a tool for assessing critical habitat for fishery resources. | ||||||||
Location | Middle Grounds area, Block Canyon, Atlantis Canyon, Veatch Canyon, mid-Atlantic Bight, North America, North Atlantic; | ||||||||
Summary | Optimal weather conditions allowed us to conduct a variety of submersible, sidescan sonar and sub-bottom profiling operations in the Middle Ground area between Block and Atlantis submarine canyons. Overall, we successfully completed 13 submersible dives and made numerous transects for sidescan sonar. Sidescan Sonar: 129.64 km; Sub-bottom profiling: 290.39; Sediment samples: 26; video and photos. | ||||||||
Comments | Original Center People field contained: Dave Twichell - scientist. | ||||||||
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Organization |
384 Woods Hole Road
Quissett Campus
Woods Hole, MA02543-1598
(508) 548-8700
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Principal investigators | David C Twichell | ||
Crew members |
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Affiliate principal | Dr. Robert S. Jones (HBF); Dr. Churchill B. Grimes (Rutgers) | ||
Affiliate staff | Dr. Robert S. Jones - co-Ch. Sci. (HBF); Dr. Churchill B. Grimes - co-Ch. Sci. (Rutgers); Dr. Kenneth W. Able - scientist (Rutgers); Dr. Edward P. Laine - scientist (URI); Mr. Gregory C. Kennedy - engineer (HBF); Mr. Simon Sainsbury - engineer (HBF) |
Data category: | Environmental Data, Imagery, Location-Elevation, Sampling, Seismics, Sonar |
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Data type: | CTD, Photo, Video, Navigation, Biology, Geology, Sub Bottom Profiler, Sidescan |
Name | Description |
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Cruise report | Chief Scientist's report including personnel, results narrative, and tabulated summary of submersible operations. Also includes maps of submersible work. |
Equipment | Usage description | Data types | Datasets |
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Submersible | Photo, Video, Biology, Chemistry, Geology | (no data reported) | |
Video camera - deep sea | Video | (no data reported) | |
Camera- deep sea | Photo | (no data reported) | |
Loran-C | Navigation | 3 | |
Sidescan sonar | Sidescan | 1 | |
CTD 19+ with OBS, PAR, DO, Chl | CTD | 1 | |
3.5 kHz | Sub Bottom Profiler | 1 |
Dataset name | Equipment | Description | Dataset contact |
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1984-009-FA-LN-001 | Loran-C | Paper printouts of navigation with 15 minute or random fix intervals: includes time, lat., long., speed and course over ground. | Alice M. Orton |
1984-009-FA-LN-001-01 | Loran-C | Track maps of geophysical survey areas and submersible dives, plotted from ship navigation with MapGen software, in Lat./Long.: UTM projection, 1:25,000 scale, 2 maps for each of 5 areas. | Alice M. Orton |
1984-009-FA-LN-002 | Loran-C | Paper charts from bridge plotter of sidescan sonar and 3.5 kHz survey lines and submersible dives; Loran-C coordinates. | Alice M. Orton |
1984-009-FA-SO-001 | Sidescan sonar | Paper sidescan sonar profiles in folders; images not slant-range or ground-range corrected. | Alice M. Orton |
1984-009-FA-OM-001 | CTD 19+ with OBS, PAR, DO, Chl | Digital tape(s) of CTD STATION DATA, | Nancy K. Soderberg |
1984-009-FA-SE-001 | 3.5 kHz | Paper 3.5 kHz seismic profiles in folders: collected via EPC recorder. | Alice M. Orton |