Seismic survey ship owner PGS has revealed a busier first quarter for its eight operational vessels.

The Oslo-listed company said that utilisation for contract work was up to 36%, from 23% in the final three months of 2017.

The multi-client figure increased to 31% from 23%.

The number of ships stacked or on standby dipped to 29% from 32%.

It has warm-stacked two vessels in the low winter season.