Middle East seismic survey player Polarcus is being sued by rival Norwegian owner PGS in an Australian patent row.

The Oslo-listed shipping company said it has accepted service of court proceedings filed by PGS Australia relating to the acquisition of seismic data on three surveys in Australia, and the processing of that data.

The proceedings follow three years of intermittent correspondence from PGS in response to which Polarcus, supported by leading patent counsel, has provided overwhelming evidence that Polarcus' activity did not intersect the patent, it added.