Norway’s Det Norske Veritas (DNV), in consultation with WesternGeco, PGS and Fugro-Geoteam, has developed a new class notation for seismic vessels that focuses on increasing availability of the vessel during critical phases of seismic operations.
The new technical requirement specifies improved redundancy and proper deck arrangements to ensure continuous operation without loss of speed.
DNV has consulted with vessel operators and suppliers of seismic handling and high-pressure equipment to make sure that current and future industry challenges are addressed.
DNV director for market and business development Jan Kvålsvold said that the new class notation helps owners in this high-tech special vessel segment to meet future demands safely and reliably.
"Even though new energy sources are being developed, fossil fuel will maintain dominance well into the future," Kvålsvold said. "The demand for suitable seismic exploration vessels is already high and will continue to grow."
The class notation has taken into account the DNV concept for redundant propulsion, so that any failure on board the vessel will not lead to a loss of more than 50% forward thrust, sufficient to maintain a minimum speed and to protect air guns and streamers.
The new notation also addresses the deck arrangement for side-by-side transfer of crew and supplies, as well as the bridge arrangement to ensure good views of the streamers and nearby workboats.