Typically an assembly of vertically oriented geophones and hydrophones connected by electrical wires and deployed on the seafloor to record and relay data to a seismic recording vessel. Such systems were originally introduced to enable surveying in areas of obstructions (such as production platforms) or shallow water inaccessible to ships towing seismic streamers. Recent developments provide four component (4C) seabed systems to record shear wave (S-wave) as well as P-wave energy.
See PDF file attached
October 2011 – The work on the pipeline from Tamar to Israel has started with the Allseas. This is a 150 km double line in which 12 bcm of natural gas can be transmitted. The gas will reach the production platform that will be constructed adjacent to the existing Mari-B platform. The platform is being constructed by Kiewit at a cost of $800 million
