Before any installations on the seabed, it is necessary to conduct pre-engineering survey on the proposed installation location or route. Typically, the information is acquired using a combination of techniques: |
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Seabed bathymetry and topography : Echo sounding or swath echo sounding (particularly in areas of uneven seabed, outcrops, corals, pockmarks, sand waves, etc) |
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Seabed features and obstructions: Traditionally by side scan sonar, modern mosaicking systems will provide an acoustic “photograph” of the seabed in which prominent features and morphology can be more easily understood and interpreted. |
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Detection of ferromagnetic objects and anomalies: The Magnetometer system will be deployed to identify metallic objects, such as pipeline, cable and metallic debris. |
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The Sub-Bottom Profiler will be deployed to identify strata below the seabed more over shallow gas can be extract from SBP Data. |
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Final text report “Pre-Engineering Survey Final Report” | |
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Alignment sheets. |