Abstract: A gravity installed anchor including a metal plate provided with one or more connection points for extending an anchor line from a front face of the plate. The gravity installed anchor preferably includes an elongated shank connected to the plate and arranged for being directed along the plate during the gravity installation process, the elongated shank provided with a nose portion with a nose. The plate may be rotated to an angle relative to the shank after being gravity installed in the seafloor.

Abstract: Method for installing an anchor that is released in the sea, especially for installation of in soft seabed sediments. An anchor is rebased in free fall from an at rest position or nearly at rest position and with the longitudinal axis vertical from a position in the water, and that ensures directional stability and nonroutional acceleration during movement towards the seabed. The anchor body (14) has a main member or shank (22) with a regular cross section, especially circular or regular polygon form, with tip (23) and with upward projecting shank (25) with lower average density than the main anchor body has. The anchor body is shaped such that the center-of-gravity lies lower than the middle of the total anchor length and below the average distance to the sum of all the fluid forces which ensures directional stability and nonrotational acceleration during free fall and penetration into the seabed sediments.

Abstract: Method for generating seismic intersection waves in an underground formation, wherein poles that are previously driven into the formation for other purposes or poles that are driven down for this purpose, said poles being used as a transfer medium for the intersection waves into the formation. The poles are put into transversal vibration by means of an oscillating mass, the oscillations being suitable for forming mainly horizontal polarized waves. In order to achieve a best possible impression of the formation, transversal waves may be generated in a first direction in a first period of time, and a second direction, different from the first direction, in a second period of time. Alternatively, the oscillating mass can be arranged to swing parallel to the pole in order to be able to generate pressure waves. The poles can be equipped with a "skirt", and/or with radially extending flanges in order to secure the best possible attachment in loose formations.