Marine operations to install protective structures over sunken vessel wreckage
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Geography
Black Sea
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Period
2025
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Services
Survey equipment rental
Marine Geodesy provided navigation and hydrographic support to Morshelfservice LLC for the installation of protective cofferdams over the wreckage of Volgoneft-212 and Volgoneft-239 in the Kerch Strait, Black Sea.
The work involved transport, positioning, ballasting and station-keeping of the protective structures. Navigation and hydrographic equipment was supplied on rental, and positioning solutions were developed for conditions without GNSS signals, with redundant telemetry channels.
The scope included:
- Installation and calibration of navigation and hydrographic equipment on the transport and towing vessel.
- Pre-installation hydrographic surveys of the wreck areas.
- Geometrical checks of cofferdams and control of mooring reference points.
- Navigation and hydrographic support for anchor placement.
- Navigation support for towing the cofferdams to the installation site.
- Geodetic control during ballasting and placement on the seabed.
- As-built hydrographic surveys, data processing and preparation of survey plans.
Results of the project
Navigation and hydrographic support without GNSS was implemented using robotic total stations and multiple telemetry channels, in accordance with the customer's accuracy requirements.
