File:Wire drag operations.jpg
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Summary
| Description |
A United States Coast and Geodetic Survey diagram of wire drag hydrographic survey operations. The basic principle is to drag a wire attached to two vessels; if the wire encounters an obstruction it will come taut and form a "V." |
|---|---|
| Source | |
| Date |
ca. 1920 |
| Author |
NOAA image |
| Permission (Reusing this file) |
See below. |
| Other versions | None known |
Licensing
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 10:08, 12 July 2010 | | 700 × 452 (98 KB) | Admin (talk | contribs) | == Summary == {{Information |Description = A United States Coast and Geodetic Survey diagram of wire drag hydrographic survey operations. The basic principle is to drag a wire attached to two vessels; if the wire encounters an obstruction it will come taut and form a "V." |Source = http://usasearch.gov/search?v%3aproject=firstgov-noaa-images&v%3afile=viv_1133%4023%3aatwYe1&v%3aframe=viewimage&v%3astate=%28root%29%7croot&id=Ndoc16&rpaid=& |Date = ca. 1920 |Author = NOAA image |Permission = |other_versions = None known }} == Licensing == {{PD-USGov-NOAA}} |
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