A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The Scripps Institution of Oceanography Marine Technicians Handbook: Rock Dredging in Deep-Sea Areas
It is possible to locate with precision the source of rock samples obtained during deep-sea scientific dredging if adequate precautions are taken in the dredging operation. A pinger on the wire provides an increase in precision over that obtainable without its use. Dredging is usually carried out up-slope, and may be done either with the ship drifting or underway at slow speed. A weight placed ahead of the dredge helps to insure a proper angle of attack by the dredge bucket. Careful note-keeping is essential for the later determination of the location of the sample with respect to other observations. Sample log forms, a reproduction of the notes on actual lowerings, step-by-step instructions, and plans for typical chain bag- and pipe-dredges are included. (Author)
The Scripps Institution of Oceanography Marine Technicians Handbook: Rock Dredging in Deep-Sea Areas
It is possible to locate with precision the source of rock samples obtained during deep-sea scientific dredging if adequate precautions are taken in the dredging operation. A pinger on the wire provides an increase in precision over that obtainable without its use. Dredging is usually carried out up-slope, and may be done either with the ship drifting or underway at slow speed. A weight placed ahead of the dredge helps to insure a proper angle of attack by the dredge bucket. Careful note-keeping is essential for the later determination of the location of the sample with respect to other observations. Sample log forms, a reproduction of the notes on actual lowerings, step-by-step instructions, and plans for typical chain bag- and pipe-dredges are included. (Author)
The Scripps Institution of Oceanography Marine Technicians Handbook: Rock Dredging in Deep-Sea Areas
R. L. Fisher (author) / P. J. Liebertz (author)
1973
45 pages
Report
No indication
English
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