| P number: | P001384 |
|---|---|
| Old photograph number: | TS05026 |
| Caption: | Airgun system sitting on the deck of a survey vessel during exploration by the British Geological Survey. |
| Description: | Airgun system sitting on the deck of a survey vessel during exploration by the British Geological Survey. The subsea bed can be mapped using acoustical methods. A device sends a pulse of sound into the sea bed and the echoes are recorded. From this, an image of the geology can be derived. This particular device is called an airgun. It consists of a high pressure cyclinder and valve system. It was towed behind the ship and was connected to a high-pressure air compressor. At regular intervals high-pressure bubbles of air were released into the sea. This created a sharp acoustical pulse which travelled into the sea bed. Seismic surveying is a very cost-effective method for the remote surveying of the geology beneath the sea bed. It is used routinely by the oil industry with a variety of acoustic sources. |
| Photographer: | Unknown |
| Copyright statement: | NERC |
| Acknowledgment: | This image was digitized with grant-in-aid from SCRAN the Scottish Cultural Resources Access Network |
| Orientation: | Portrait |
| Size: | 194.58 KB; 644 x 1000 pixels; 55 x 85 mm (print at 300 DPI); 170 x 265 mm (screen at 96 DPI); |
| Average Rating: | Not yet rated |
| Categories: | Unsorted Images |
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