The OBS (ocean-bottom seismometer) has spent a while on the seabed (some as deep as 4000m). After the Seismic Survey is completed the OBS must be recovered. A signal is transmitted, the OBS releases a weight which had it anchored to the seabed and it rises to the surface. We manoeuvre the ship up close and a grapple is thrown to snag the rope.
Saturday, 15 March 2008
Posted by Unknown at 20:39
