Oslo-listed Petroleum Geo-Services (PGS) is expecting big pre-tax earnings from the fourth quarter.

The seismic survey vessel owner said it expected EBITDA will be more than $100m to 31 December.

This is due to multi-client revenue in excess of $170m for the period.

Multiclient fleet utilisation actually fell year-on-year to 23% from 27%. It has 32% of the fleet in layup, against 29% in 2016.