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Browsing by Subject "USBL"

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  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Modern methods of underwater positioning applied in subsea mining
    (Wydawnictwa AGH, 2011) Tomczak, Arkadiusz
    The project of subsea exploration is a long lasting and complex process. In most of the cases the underwater operations are connected with hydrographic and construction surveys that is equivalent of geodetic survey on shore. In the industry the need of constant monitoring of underwater activity such as tracking of autonomous robots and elements of infrastructures exist. It is possible by means of underwater acoustic positioning systems. The paper presents modern underwater positioning methods widely used in offshore mining sector in the aspect of system principles, measured navigation parameters and their achievable accuracy. The underwater LBL (Long Baseline) acoustic spoolpiece (segment of pipe joining the manifold and well) metrology was described and the necessary steps to have LBL system ready for logging session such as calibration of an array of transponders (baseline calibration) and finding grid coordinates of transponders in array (box in calibration). In the summary the present research directions in the field of underwater positioning were appointed.