CGG announced today the commencement of a new multi-client 3D survey in the Northern North Sea. The survey will provide a second azimuth over CGG’s existing Northern Viking Graben (NVG) multi-client ...
IV. Simple Instruments for Measuring both Magnetic Azimuth and Altitude. ALTHOUGH undoubtedly for final observations at any monument a theodolite must be employed, using the sun or a star in order to ...
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