Oslo-listed owner Electromagnetic Geoservices (EMGS) has seen its vessel-use figures plunge in the fourth quarter.
Utilisation to 31 December was just 13%, compared to 89% a year ago.
For the full year 2017, the figure was 56%, down from 70% in 2016.
One of its two operational vessels, the 3,000-dwt BOA Thalassa (built 2008), was laid up until 20 November.
